Before leaving...

Thanks for your visite. If you like my work, you can support me with the following possibilities:
Subscribe to my YouTube channel
I post full test videos every month. By subscribing you will be notified of each new video, but the number of YouTube subscribers is important to obtain products to test.


Subscribe to my page on Facebook
I regularly post updates on Facebook, I also organize contests to win prizes. Here too, the number of fans is important to obtain material.


Use my links
I don't display ads on my site because I don't like it. My only source is from purchases you make from my links. I earn a meager commission on every purchase (about 2% on average), it costs you nothing and keeps me going. Here are some links to buy your products: == Aliexpress == Banggood

On this page:
Video test
Price Unihertz Tank
First configuration
CPU / GPU Performance
Benchmark Antutu/3DMark
Energy performance
Network performance
Wifi performance
GPS performance
Battery range
Photo camera test
Photo quality
Video quality
External audio quality
Audio quality (headphones)
Screen quality
Operating system
Test / Review conclusion
Questions answers

Follow me: rss feed
Receive notifications for new articles

Unihertz Tank : test / review

Unihertz Tank : test / review (a weapon against zombies?)
Category: Smartphones

We live in a society where brands seek to please even if it means sacrificing things and this is sometimes done against common sense. I test a lot of smartphones that fall into this category, these smartphones do not bring much new, they are not bad phones but owning them is an emotional choice. Fortunately, there are a few exceptions with brands that take risks and sail against the current by offering a slightly different product. This is the case of Unihertz, a company I had never heard of and which offered me to test its Unihertz's all in the name! [b][b] Now imagine yourself in another world, after an invasion of zombies for example, what would you do with your beautiful phone? With the Unihertz Tank your chances of survival will be much higher because if you ever run out of the 22000 mAh battery, you can still use the phone to defend yourself, the beast weighs 560 grams! [b][b][b]

Video test

[b][b][b][b][b]linkManufacturer web site:[b][b][b]linkSite where I have bought the Unihertz Tank:[b][b][b]

Structure of my tests

I test the phones according to a pre-established structure (see below) to provide you with as much information as possible. Unfortunately, this takes a long time. Some tests like network performance tests take several days and for photo tests I sometimes have to wait until the weather is suitable to take pictures in good conditions. I am therefore obliged to publish the tests step by step, so I invite you to come back if the test is not complete at the time of your visit.[b]
How are my tests different from others on the web?

- I usually buy the devices with my own money, so price is just as important as you are!
- I keep the devices for at least a few weeks (sometimes more) to see what they are worth in real conditions.
- I answer (when possible) your questions to help you decide before you buy
- no one pays me to do these reviews, so I'm completely neutral and independent...
- My pages are not filled with ads

POCO F5 : test / review
Unihertz Luna : test / review
Xiaomi Redmi Note 12 Pro: test / review
Redmi Note 11 : test / review
Redmi Note 11 Pro test / review
Redmi 10A: test and review
POCO M5 : test, review and price
POCO X5 5G : test / review
Xiaomi Redmi Note 12: test / review
Unihertz Tank : test / review

Price Unihertz Tank

The list below shows the prices for the Unihertz Tank from more than 50 sites around the world. If you are not satisfied with any price, you can subscribe to a price alert to be the first to be notified when the price drops.[b]
No price available for this product (not yet or not anymore)
helpThe above links are affiliate links from companies such as Amazon, Gearbest, Aliexpress,... If you appreciate my work, I would be grateful if you could purchase these products through these links. It costs you absolutely nothing but I get a small commission that allows me to buy the material I test. Thank you very much!


December 19, 2022: reception of the phone, the test can begin.[b]

Why this phone?

I test all kinds of phones and I test them with the same objectivity, regardless of the brand or type of smartphone. Unlike many sites offering smartphone reviews, I also test smartphones from little-known brands and also rugged type smartphones that are aimed at a very specific audience. The Unihertz Tank is not for clumsy people who sometimes drop their phone from their pocket, it is a phone that should be considered as a tool for those who have work where the risk of damaging a smartphone is great. I am also thinking of adventurers who go to remote areas without being able to charge the phone. [b][b] This phone is clearly a very exotic model compared to the phones I usually test. I've already tested phones of this type but this one doesn't cut corners, we have heavy artillery here and I find it quite comical to test. Phones of this type often neglect the software part, the performance or the photo and this is normal given their primary usefulness. From a purely theoretical point of view, this is not the case with this phone because it should be capable, smooth and able to take detailed photos. It also has an infrared sensor that will allow you to take photos (and even videos) at night. [b][b][b]


By agreeing to test this phone, I knew what type of product I was going to receive and I expected something brutal right down to the packaging. When I received the package, the weight surprised me, it is by far the heaviest phone I have tested but on the other hand when I opened the packaging, I was positively surprised. The black box gives an impression of quality and inside the box it is the same, it is not a typical packaging for a phone that will end up lying in the mud. [b][b] The box contains the phone, a charger, a charging cable, a screen protector (I wonder what it could be used for) and a manual. [b][b][b]
Length : 175.6
Width : 85.30
Thickness : 23.9
Weight : 560
USB Type : Type C
Infrared port : Yes

First configuration

The Unihertz Tank runs on Android 12, so the startup procedure is almost the same as on other phones running the same version of Android 12. I just noticed a difference on a screen where you have to choose an individual or family profile , I hadn't seen this on an Android phone before. [b]


The Unihertz Tank is a massive phone and not only because of its weight, it is very imposing, it takes a lot of room to carry that huge battery. The phone is protected on all sides by a metal or hard plastic border, the screen is also protected by a thick protective film which also has the effect of reducing the mirror effect when the light is strong. [b][b]
On the right edge we find the usual buttons to turn the phone on/off and the volume buttons. These buttons are located quite high, so you need to have a big hand to hold the phone from the bottom and reach the buttons. The ignition button is also equipped with a fingerprint sensor and the buttons are metallic and protected against water infiltration. [b][b]
On the other side, there is a red button that triggers the flashlight by default and it is sensitive enough to trigger the flashlight by accident. The other button is a button that triggers the yellow zone and its LEDs, watch your eyes! I don't feel like it's possible to customize these buttons but at this stage of testing I still have a lot to discover in the phone.
The sim drawer is on the top of the phone and can be removed without accessories, just run your fingernail along the side of the drawer. The sim drawer is tiny compared to the size of the phone, it can only accommodate one sim card.
The back looks like an armored vehicle with its large metal surface. At the top we find the main sensor of 108 million pixels, a macro sensor and an infrared sensor which can take photos and film in the dark. The yellow area is made up of very powerful LEDs that will ridicule most smartphone lamps because they are so powerful.
Below there is a USB type C port protected by a waterproof rubber strip. The USB port is not located in the center, so you have to pull the rubber strip quite far to be able to access it.
The screen is huge (6.81 inches) and even if borders are visible, these borders are quite small for this type of phone. The screen is protected by a thick plastic film to protect it from scratches, the box contains a second protection. [b][b] You really have to have this phone in your hand to realize how massive it is, it's not a phone that will easily fit in a pocket but if you drop it, remember to remove your foot because with its 560 grams, your foot may have a bad time.[b]


[b]The information below comes from the Device Info HW application. The application provides detailed technical information about the tested phone. The Unihertz Tank runs on the same architecture as the Poco M5 but I will come back to this point in one of the following paragraphs. I hadn't received a detailed technical sheet with the phone, so I had to dig a little into its technical characteristics to understand what it was made of. The fact that it runs on the same architecture as the POCO implies that it shares the following components: CPU, GPU, modem, wifi chip, gps chip,... A priori from a technical point of view it should therefore have performance quite similar to POCO except that its huge armor could play a role in network sensitivity but this point will be tested later in this test as well. [b][b] This phone is generous in terms of memory because with 8Gb of RAM, you will have no problem leaving a large number of applications open and its 256 Gb of storage will allow you to store many photos and videos. My memory test also shows that this memory is quite fast, so this phone is quite fluid to use, it does not suffer from slowdowns. I see it is also wifi6 compatible but I don't have a compatible router so I couldn't test this type of protocol. In any case, for a rugged type phone, Unihertz has not neglected its technical sheet because even if the POCO M5 is an entry-level phone, it offers a good level of performance and that is quite a rare thing. for telephones like the Unihertz. [b][b][b]

CPU / GPU Performance

CPU : MediaTek Helio G99
GPU : Mali-G57 MC2
Memory (RAM) : 8 Gb
Storage : 256 Gb
[b][b]As I wrote in the previous paragraph, this phone is equipped with a Mediatek Helio G99 CPU, it is the same CPU as the POCO M5 and for the GPU it is the same as well, it uses a Mali-G57MC2. The POCO is an entry-level phone that offers performance of a mid-range phone, so it should not be taken as a benchmark. This kind of gear allows the Unihertz to respond quickly when you need it, I didn't even notice any slowdowns when I used the camera's 108MP mode.[b]

Benchmark Antutu/3DMark

I obtained a score of 313766 points with Antutu, it is 16% better than the POCO M5 which nevertheless uses the same hardware. This difference comes from better GPU and memory performance. A priori this phone is not designed for gamers but with such performance it will be able to run most games in good conditions and with such a battery you will be able to play much longer than with a POCO M5. The other advantage that gamers might be interested in is that the temperature did not rise during the benchmark with Antutu, not even one degree! [b][b] [b][b]

Energy performance

The energy performance of this type of phone is important because it it is she who will determine if the battery will be well used and if these 22000 mAh will allow you to use the phone for a very long time before recharging it. As with other phones, I pushed this Unihertz hard for several minutes to isolate the performance of each component. [b][b] Average CPU consumption when pushed all the way: 1.26W [b] Average GPU consumption when pushed all the way: 2.2W [b] Average consumption of the FPU when pushed to the limit: 3.94W [b] When these 3 components are pushed to the limit at the same time, the consumption rises beyond 8W with a little loss of efficiency. [b] Average battery temperature over the duration of the test: 31°C (with a starting temperature of 27°C and 36°C after 8 minutes of testing) [b] The screen seems to consume approximately 1W which is quite low for a screen of this size (the brightness was at 50%). [b][b] What should we take away from these figures? [b] From a purely performance point of view, this second test confirms that this phone is more performance than the POCO. The Unihertz has more efficient power management which combined with its huge battery should result in gigantic battery life, this phone has above average power efficiency.[b]
Antutu score : 313766
Antutu CPU : 91690
Antutu GPU : 76810
Antutu UX : 55924
Antutu Mem : 89342
[b]Top 10 - performance ranking based on Antutu
1. Poco F5 - 910362
2. Poco F4 Gt - 853016
3. Realme Gt - 811858
4. Black Shark 4 Pro - 759986
5. Poco X4 Gt - 714577
6. Oppo Find X2 Pro - 605184
7. Oneplus 8t - 595000
8. Poco F3 - 589677
9. Xiaomi Mi 10t Pro - 581650
10. Oneplus 8 Pro - 579417

Number of smartphones in the ranking:155
Position of this smartphone in the ranking:43/155

Note: this ranking only contains the phones I tested as well as a few others that I added for reference.
[b]Gaming[b]To test the performance in game, I download the mobile PUBG game and evaluate the in-game experience, graphics level and depth of vision. This game is quite demanding and should help you evaluating the performance of a phone. The Unihertz Tank is not a phone for gamers but it could very well appeal to gamers who want good battery life without sacrificing too much performance. This phone offers a very good level of performance that allows you to play almost any game in good conditions. It is only for heavy 3D games that the level of detail may have to be reduced. The textures are well detailed, the depth of the image is important and the experience is really good. The phone is probably too big to really be considered a gamer's phone, but if you're the type to throw everything on the floor when you lose a game, don't throw this phone anywhere because you might break something.[b][b][b]

Network performance

The Unihertz Tank offers very wide coverage of 3G and 4G frequencies, it is compatible with certain frequencies that are quite rare on other phones. No problem to use it in Europe but without having checked each country individually, I think we can consider that this phone is a global phone that can be used in many countries outside Europe.[b]
3G frequencies : B1, B2, B4, B5, B6, B8, B34, B39
4G frequencies : B1, B2, B3, B4, B5, B7, B8, B12, B13, B17, B18, B19, B20, B25, B26, B28A, B28B, B66, B34, B38, B39, B40, B1
Number measurements : 1426
Average signal (reference) : -91.21
Average signal (telephone) : -93.97
Average deviation reference/telephone : -2.76
Min/Max signal (reference) : -90 / -95
Min/Max signal (phone) : -89 / -96
Choose your country to check if your phone is compatible:

The frequencies displayed below will allow you to see if this phone is compatible with your operator or if you will be able to use it in the country where you are going on vacation.

Signal 4G (from December 2020)[b]I decided to change the methodology for measuring the network because I noticed that the configuration of the mobile network changes over time. This makes it more difficult to compare phones because the conditions are no longer exactly the same.[b][b]To overcome this problem, I set up a device that captures 24 hours a day about ten parameters from the mobile network (ex: cell id, rssi, rsrq, snr, frequency,...). I then place the phone next to the device for 24 to 48 hours taking the same measurements so that I can compare them. [b][b] Overview of the phones tested with this methodology[b][b]
Phone tested:MeasurementsAvg signal (reference)Avg signal (phone)Min/Max (reference)Min/Max (phone)
Samsung Galaxy S10+457-93.06-97.39-89 / -98-97 / -99
Xiaomi Mi 9t Pro669-93.69-95.84-90 / -95-92 / -98
Poco F2 Pro1438-91.02-94.99-89 / -94-94 / -96
Xiaomi Mi 10 Lite 5g1645-90.77-95.02- 88 / -98-95 / -100
Poco X3821-94.89-103.19-91 / -97.7-101 / -104
Umidigi Bison2343-92.71-96.46-90 / -99-94 / -102
Oukitel C211101-92.04-94.99-90 / -97-92 / -95
Poco M31116-92.09-91.74-88 / -98-90 / -99
Xiaomi Mi 10t Pro1071-90.61-94.03-88 / -94-94 / -96
Umidigi A9 Pro981-90.40-94.01-88 / -95-93 / -95
Redmi Note 9t1201-92.149-91.71-90 / -97-91 / -97
Xiaomi Redmi Note 10999-92.35-93.99-88 / -97-92 / -98
Xiaomi Redmi Note 10 Pro877-89.72-90.56- 88 / -92-89 / -95
Poco X3 Pro1876-91.45-92.91-90 / -94-90 / -96
Poco F31382-90.79-94.2-89 / -94-93 / -98
Oneplus Nord N100896-91.23-96.005-88 / - 99-96 / -99
Xiaomi Mi 11 Lite2875-91.36-91.49-87 / -96-90 / -96
Samsung Galaxy A521427-89.27-93.39-87 / -98-92 / -96
Doogee S96 Pro1259-94.2-91.21-90 / -102-88 / -95
Xiaomi Redmi Note 10s957-92.07-97.62-90 / -102-96 / -102
Poco M3 Pro1247-91.76-102.97-99 / -104-88 / -98
Realme Gt843-96.49-94.02-93 / -101- 92 / -96
F150 R20221002-92.4-105.1-90 / -97-98 / -110
Umidigi Bison Pro936-94.2-104.98-91 / -98-95 / -105
Redmi 102141-94.74-100.92-92 / -98-99 / -101
Tcl 10 Pro871-93.43-94.001-92 / -96-93 / -95
Poco M4 Pro570-93.71-96.78-91 / -98-95 / -99
Google Pixel 51444-91.02-97.02-90 / -94-97 / -101
Xiaomi 11t1576-92.305-92.003-90 / -96-92 / -93
Redmi Note 111223-92.5-91.32-92/-97-90 / -93
Black Shark 4 Pro2383-95.178-95.42-90 / -100-93 / -101
Redmi Note 11 Pro349-95.33-93-89 / -101-92 / -94
Poco M4 Pro 4g1202-90.85-88.95-87 / - 95-88 / -98
Tcl 30 Se567-92.11-92.85-88 / -98-99 / -93
Poco X4 Pro562-92.06-94.01-90 / -95-95 / -93
Redmi Note 11 Pro Plus 5g945-93.5-93.54-91 / -97-92 / -97
Poco F4 Gt832-95.02-93.09-90 / -99 -93 / -97
Oukitel Wp181351-95.94-92.92-91 / -97-92 / -97
Poco X4 Gt387-96.99-96.505-96 / -98-95 / -98
Poco F4524-95.78-95.04-93 / -99-94/-96
Oneplus Nord 2t1340-98.83-96.305-95 / -102-90 / -99
Redmi 10a707-89.026-97.97-87 / -91-97 / -103
Poco M5762-95.18-95.07-98 / -93-99 / -94
Unihertz Tank1426-91.21-93.97-90 / -95-89 / -96
Poco X5 5g2234-92.3-99.1-91 / -95- 100 / -98
Google Pixel 6a853-91.8-95-90 / -94-95 / -97
Redmi Note 121023-89.6-96.99-88 / -93-95 / -97
Redmi Note 12 Pro1576-91.96-94.93-89 / -96-93 / -95
Unihertz Luna1133-91.7-91.94-89 / -95-92 / -94
Poco F51321-91.69-95.05-90 / -97-94 / -97
I performed 1426 measurements to assess the 4G network sensitivity of this phone and I was positively surprised by the result. Rugged phones are rarely very sensitive to the network probably because of their armor but the Unihertz manages to stay close to the reference signal with only 2.76 dBm difference with the probe. It's a pretty good result for a normal phone, so it's still a better result for this kind of phone. However, I noticed signal loss. Of the 1426 measurements, I noted 15 loss of signal where the phone no longer picked up the network although the network was present since the probe never lost contact with the network.[b][b][b]Download/Upload speed[b]To test the download speed, I have identified some 4G cells offering good performance where I test all my devices several times to see what download and upload speed they can achieve.[b]Top 10 - speed ranking in download
1. Samsung Galaxy S20 D:351Mbps U: 20Mbps
2. Poco X3 D:232Mbps U: 55Mbps
3. Xiaomi Mi 10 Lite 5g D:223Mbps U: 52Mbps
4. Poco F2 Pro D:207Mbps U: 53Mbps
5. Xiaomi Mi Note 10 Lite D:153Mbps U: 68Mbps
6. Xiaomi Mi A3 D:150Mbps U: 60Mbps
7. Xiaomi Redmi Note 9s D:150Mbps U: 60Mbps
8. Xiaomi Mi 8 Lite D:149Mbps U: 60Mbps
9. Samsung Galaxy A21s D:147Mbps U: 51Mbps
10. Huawei Y6 2019 D:145Mbps U: 61Mbps

Number of smartphones in the ranking:30
Position of this smartphone in the ranking:0/30

Note: the theoretical maximum speed of a telephone is often limited by the configuration of the mobile network and the congestion of the network at the time of the measurement. So maybe you could get a higher speed on another network

Wifi performance

To test a phone's ability to receive the network properly, I take measurements near my router and then remotely (and always at the same place). This gives me an average in dBm where a value of -90 dBm indicates poorer performance than a value at -30 dBm.[b]
Wifi signal[b]I expected to observe a small degradation in wifi performance compared to the POCO M5 and it is indeed the case but the difference is not as significant as I imagined. I had obtained an average signal of - 17dBm with the POCO and I obtained -23dBm with the Unihertz, so it's less good but it's still quite acceptable. For my remote router test I see the same type of difference with -56dBm for the POCO and -59dBm for the Unihertz. This phone is therefore a little less sensitive but ranks average.[b][b]Top 10 - wifi sensitivity ranking
1. Poco F2 Pro -11dBm
2. Xiaomi Redmi Note 10 Pro -12dBm
3. Realme Gt -12dBm
4. Redmi Note 12 Pro -13dBm
5. Samsung Galaxy A21s -13dBm
6. Redmi Note 11 Pro -13dBm
7. Poco F5 -14dBm
8. Oneplus Nord N100 -15dBm
9. Poco X3 Pro -15dBm
10. Poco F3 -15dBm

Number of smartphones in the ranking:74
Position of this smartphone in the ranking:0/74

[b]Download/Upload speed[b]To test the speed in Wifi, I connect to my router in 2.4Ghz and 5Ghz (if available) and use the Ookla application to measure the speed.[b]Top 10 - wifi download speed ranking
1. Redmi Note 11 Pro Plus 5g 866Mbps
2. Redmi Note 12 Pro 866Mbps
3. Poco F4 866Mbps
4. Google Pixel 6a 866Mbps
5. Poco F4 Gt 866Mbps
6. Poco X4 Gt 866Mbps
7. Oneplus Nord 2t 866Mbps
8. Black Shark 4 Pro 866Mbps
9. Poco F5 866Mbps
10. Poco M4 Pro 4g 433Mbps

Number of smartphones in the ranking:72
Position of this smartphone in the ranking:0/72

Note: I have a 400Mbps line and a modem capable of delivering higher speed, but I can never be sure how much bandwidth is available when doing a test.

GPS performance

[b]To test the accuracy of the GPS signal, I use two positioning applications to evaluate the difference between the actual position and the position indicated by the phone. This test is done outdoors with nothing to obstruct the signal. An accuracy level of up to 3 meters can easily be corrected by an application (e.g. Google Maps).[b][b] I got 1 meter GPS accuracy pretty quickly with this phone, it could pick up up to 30 satellites at the same time. If I compare this level of precision with my real position on a map, I get a slightly larger deviation of around 2 to 3 meters maximum, so the level of precision is quite good. I found only one frequency among all the satellite networks, I found the L1, B1, E1.[b][b]Top 10 - GPS accuracy ranking
1. Poco M5 1m
2. Poco X4 Gt 1m
3. Unihertz Tank 1m
4. Oukitel C21 1m
5. Redmi 9a 1m
6. Redmi 10a 1m
7. Xiaomi Redmi Note 10s 1m
8. Doogee S96 Pro 1m
9. Xiaomi Redmi Note 9 1m
10. Umidigi Bison Pro 1m

Number of smartphones in the ranking:44
Position of this smartphone in the ranking:3/44

Note: An accuracy of 3 meters or less can easily be corrected by a good GPS application. Phone performance also plays a role in how fast your display updates, so good accuracy could be compromised by too slow a display.

Battery range

To test battery life I developed an application that measures the battery level minute by minute until the battery is empty. This application consumes about ten percent of the phone's resources and I do a test with 100 brightness. This test aims to reproduce a contemplative use of a phone (e.g. surfing the internet, reading articles, spending time on social networks). These results are not valid for intensive gaming/streaming use.
Capacity : 22000
Range (50% brightness) : 2498
Charging time : 188
The Unihertz Tank is by far the phone with the biggest battery of all the phones I've tested and with a battery of this size I expected 2 things: a very long charging time and an incredible battery life. I was wrong on both counts. First of all, there is the charging time, which is quite fast for a battery of this size, but only if you use a fast charger. With my UGREEN 100W, I charged the battery from 3 to 100% in 188 minutes. It's still 3 hours but with such a battery size it's an excellent performance. The charging is quite linear even though the graph below has an anomaly, my metering app lost units of time at one point which made the charging appear to be faster at the end. It's not, I measured the time units by hand to get 188 minutes.
I expected a gigantic battery life and in fact, even if the battery life is good, I tested a phone that did better with a smaller battery. I got the best battery life with an Oukitel WP18 where it took me more than 47 hours to drain the 12000 mAh battery where I got 41h with the 22000 mAh of the Unihertz. How is this difference explained? Quite simply by the fact that the Oukitel is an entry-level phone with very limited performance and therefore much more moderate consumption. The Unihertz is a much more powerful and therefore more greedy telephone.

Photo camera test

To test the quality of photos produced by a phone, I do a technical test (resolution, sharpness, chromatic aberration,...) in studio (identical conditions) to evaluate the technical part objectively. From the second half of 2020, I built my own laboratory to take completely objective technical measurements. I then take pictures in real conditions to see how the camera performs. I then evaluate these photos according to my criteria but I publish the photos so that you can evaluate the result according to your criteria.[b]


Selfie / resolution : 32
Selfie / sensor : Sony IMX 350
Resolution : 108
Sensor : Samsung S5KHM2
The Unihertz uses a 108MP Samsung S5KHM2 sensor as the main sensor, this sensor is quite common in Xiaomi (Redmi Note 11 Pro, Poco X4 Pro,...) but this is the first time I've seen it in my phone robust. Don't let the pixel count influence you too much because that doesn't mean anything, this sensor is a mid-range sensor that can deliver good results but in the price range of this phone there are better sensors. [b][b] The selfie sensor is a Sony IMX 350 with 32 million pixels, it's also a fairly common sensor in classic phones, it's also the first time I've seen it in a rugged phone. [b][b] Besides these classic sensors, there is also a macro sensor and an infrared sensor. [b][b] Unihertz has therefore not neglected the more recreational part of its phone because by using these sensors you will not have to make any sacrifices for the photo.[b]

Photo quality

Photo quality (indoor/studio)[b]The studio test is carried out under the same conditions so that the results can be compared on an equal basis. I calibrate my lighting for each test to obtain the same brightness and colour temperature. This test is a preliminary analysis of the technical qualities of a camera. Most phones fail this test, so you should also read the results of the other tests in the following paragraphs.[b][b] Main sensor: 108MP Samsung S5KHM2
I have already tested this sensor on many other phones and was wondering if it would look different on this phone because each manufacturer brings a layer of optimization which modifies the photos quite strongly. If I compare this photo with the same photo taken with another phone using the same camera, I see some differences. The colorimetry is a little warmer on this Unihertz and the exposure time is different. Under the same conditions the Redmi Note 11 chose a shutter speed of 1/125 where the Unihertz chose a speed of 1/200. The photo is therefore a little darker even though it is the same camera and the same lighting. I tested all the other available modes (AI, HDR, ...), all the photos are available in the photo gallery below. [b][b]
This Samsung sensor produces photos with a good level of sharpness in the center, the small characters of the Canadian banknote are perfectly readable, this sharpness drops at the periphery but remains good enough to allow reading small print. I also see here that the colorimetry is warmer and the exposure time is longer than with other phones using the same photo sensor. [b][b] This phone is also equipped with an infrared camera that allows you to take photos in the dark, here is an example:
To take this photo, I have turned off the lights in the studio as well as in the room I was in. The darkness was almost total and yet I got a pretty clear picture of everything near the phone. We can also see the reflection of the infrared sensor in the background of the photo. This infrared sensor works quite well for all objects up to 2-3 meters from the phone because beyond that, you won't see much, the infrared lighting is too weak. [b][b][b][b]Photo: technical test[b]I was inspired by industrial technical tests to create my own technical test to evaluate the technical quality of a camera. This test is an objective assessment of a camera's ability to render a scene correctly. [b][b]I test the following elements:[b]- centre sharpness, peripheral sharpness[b]- colour fidelity based on 24 reference colours[b]- level of chromatic aberration[b]- dynamic range (ability to capture dark and light areas without loss)[b]- distortion[b][b]The technical evaluation may differ from the subjective evaluation as the feeling of a photo will be influenced by the processing provided by each manufacturer.[b][b] Main sensor: 108MP Samsung S5KHM2
I have already tested this sensor on many other phones and was wondering if it would look different on this phone because each manufacturer brings a layer of optimization which modifies the photos quite strongly. If I compare this photo with the same photo taken with another phone using the same camera, I see some differences. The colorimetry is a little warmer on this Unihertz and the exposure time is different. Under the same conditions the Redmi Note 11 chose a shutter speed of 1/125 where the Unihertz chose a speed of 1/200. The photo is therefore a little darker even though it is the same camera and the same lighting. I tested all the other available modes (AI, HDR, ...), all the photos are available in the photo gallery below. [b][b]
This Samsung sensor produces photos with a good level of sharpness in the center, the small characters of the Canadian banknote are perfectly readable, this sharpness drops at the periphery but remains good enough to allow reading small print. I also see here that the colorimetry is warmer and the exposure time is longer than with other phones using the same photo sensor. [b][b] This phone is also equipped with an infrared camera that allows you to take photos in the dark, here is an example:
To take this photo, I have turned off the lights in the studio as well as in the room I was in. The darkness was almost total and yet I got a pretty clear picture of everything near the phone. We can also see the reflection of the infrared sensor in the background of the photo. This infrared sensor works quite well for all objects up to 2-3 meters from the phone because beyond that, you won't see much, the infrared lighting is too weak. [b][b][b][b]Outdoor photo quality[b]
This phone is able to take pictures in 108 million pixels without having to wait a few seconds for processing, it is very fast. In addition to taking 108 million pixel photos quickly, it can also output a DNG file with the raw data. This file retains more information than a JPG image and will facilitate post processing with Photoshop. The photo just above this text is a DNG enhanced with Photoshop where I increased the brightness and saturation. The same photo is available unprocessed in the following gallery. This shows that this phone records enough information to greatly improve the photos. The photos without processing are on the other hand a little too dark, that's what I had already noticed in the studio, it's a bit like the phone produced a raw version without modification and that it left the choice to the user to edit the photo. This sensor is used in many mid-range phones where it is underutilized because it is not possible to output DNG formats, this phone does not. [b][b]Test photo / night[b]Not yet available / tested[b][b][b]

Video quality

Stabilisation[b] I didn't expect this phone to be able to stabilize video effectively and yet the result is quite good. The shocks of walking are almost completely absorbed by the stabilization and the recalculation of pixels is quite fast. It's the first phone of its kind I've tested that is able to stabilize videos properly and it does it better than most mid-range phones.[b]Video normale conditions This phone is capable of filming in 1440p (2k equivalent) with 30 frames per second. This sensor is usually limited to 1080p on many phones, this is the first time I've tested it with such a configuration and I find the result quite interesting. Rugged phones are rarely good for video but this one does pretty well. The video is very fluid thanks to its stabilization, the sharpness is good and calculated quickly and the exposure jumps are visible. I find that the video is a little too dark as for the photos and you can see a flare appear quite quickly because of the sun's rays, but these are acceptable faults for a phone of this type.[b]Video low light[b]Not yet available / tested[b][b]

External audio quality

[b]This test is intended to give you an overview of the volume and sound quality during calls and when listening to music through the external speakers. [b][b] Audio quality / calls [b] The call sound of the Unihertz is quite powerful it is a little above average, the quality sound is correct although the high frequencies are sometimes too pushed. If I switch to speakerphone mode, the volume skyrockets to over 95dB. This is by far the highest level of call I have measured, I cringed when I made the recording, I was so surprised by the sound. At this decibel level, the sound quality is no longer very good, the sound saturates quite loudly but I can well imagine that this will not be a problem if for example you are in a noisy place. Better to be able to hear your caller than to have good sound and not hear them. [b][b] Audio/music quality [b] This type of phone is not designed for listening music, the Unihertz produces a very powerful sound but it is not of exceptional quality although I find that the sound is better than on other phones of this type, here too the goal is to produce its high volume and why it is very successful, the sound is brutal.[b]

Audio quality (headphones)

To test the quality of the phone's audio output, I connect the device's audio output to a measuring tool, then play sounds on all frequencies and measure the differences between the original sound and the sound produced by the phone. In this way I measure the phone's ability to correctly reproduce all sounds.[b]
Frequency Respons : -+0.02 / -0.20
Noise Level : -93.3
Dynamic Range : 93.2
THD : 0.0012
Intermodulation : 0.0012
Stereo crosstalk : -84.4
I hadn't noticed right away that this phone had a headphone output, it's well hidden behind the rubber protection at the bottom of the phone. I imagine that those who buy this kind of phone are not looking for a phone that produces good sound quality, that's also why the sound quality for this kind of phone is not very good. .yet the Unihertz produces a very good sound. When I listened to music with the headphones, I was surprised by the sound quality which can largely compete with what is found in the mid-range of other brands. The frequency test shows that my ear was right, this phone is able to reproduce most frequencies correctly and it does it quite well. I compared it to another rugged phone and you can clearly see the quality degradation of the other phone.[b]

Screen quality

To test the screen, I use a colorimetric probe that measures the color accuracy of a screen, as well as other parameters to see if a screen is able to correctly reproduce an image. I also test the brightness level to determine if the screen will be able to display an image in full sunlight.[b]
Screen size : 6.81
Resolution : 2340 × 1080
Ratio : 20:9
Type : LCD IPS
dE white : 17.5
dE red : 6.1
dE green : 1.9
dE blue : 6.5
dE jaune : 5.3
dE cyan : 16.3
dE magenta : 6.8
White temperature : 10906
Contrast : 1941:1
Brightness : 402
The screen of the Unihertz Tank is really huge with its 6.81 inch diagonal, it's one of the biggest screens I've been able to test so far. It's quite rare to find a screen of this size on a phone of this type. This screen is protected by a plastic film which has the effect of altering the colors and brightness. I did not remove the screen protector to do this test, so the results are a little truncated by the presence of the protective film. [b][b] I got a dE of 9.51, that's a lot compared to other phones I've tested and it's especially on blue tones (blue, cyan) that the color difference is the most important. The image is therefore generally very cold and I have not found any parameters to modify the color temperature. [b][b] I measured a white temperature of 10906K with a dE of 17.5. The protective film plays a part but I imagine that even without the protective film the color difference would still be present because the difference is too great. The color space is also smaller than the usual space. This screen is therefore not a reference in terms of colorimetry.[b][b]Top 10 - ranking of the best screens by colorimetry
1. Poco X4 Gt dE = 0.6
2. Xiaomi Mi 10 Lite 5g dE = 0.73
3. Xiaomi Mi 10t Pro dE = 0.83
4. Redmi Note 11 dE = 0.91
5. Redmi Note 12 Pro dE = 0.97
6. Google Pixel 6a dE = 1.01
7. Google Pixel 5 dE = 1.11
8. Realme Gt dE = 1.17
9. Redmi Note 12 dE = 1.17
10. Xiaomi Mi 11 Lite dE = 1.19

Number of smartphones in the ranking:75
Position of this smartphone in the ranking:72/75

Note: the colorimetric difference is measured in dE. After three, the human eye will perceive a colorimetric difference, so the dE should be the lowest. The tests were all carried out with a colorimetric probe.
[b]Brightness / Contrast[b]The screen has a brightness of 400 cd/m² and despite the projection of light in the sensor, I was unable to increase the brightness beyond this limit. The light sensor may be located elsewhere but I couldn't find it. This brightness is a bit limited to be able to read the screen in good conditions under the sun. [b][b] I measured a contrast ratio of 1941:1, it's an excellent score for this type of screen but as for the other measurements, the screen protection plays without doubt a role here as well.[b]


This phone is equipped with a fingerprint sensor located on the start button, this sensor works very well and is quite fast.[b]

Operating system

[b]The Unihertz Tank runs on a native version of Android, so there are no unwanted app additions apart from the presence of a toolbox containing all sorts of specific apps for this phone. It includes the following tools: noise test, compass, flashlight, spirit level, peak hanging, heart rate (measurement by the camera), measure height, magnification, alarm, step counter, plumb line, protractor, pressure, speedometer, underwater camera, camp lamp. This confirms once again that this phone is a real survival tool that is intended to be used in more extreme conditions than the everyday life of everyone.[b]

Encoutered bugs

Not yet available / tested[b][b]

Accessories Unihertz Tank

To better enjoy your experience with your smartphone, I offer links to all kinds of accessories that you might find useful

Protective cover / case unihertz tank
Screen protection film unihertz tank
Memory card unihertz tank
USB Cable / Charger unihertz tank
Headphones unihertz tank
Bike rack unihertz tank

Compare Unihertz Tank with the others

I assigned a score of 1 to 10 for each test that determines the strengths and weaknesses of a product. I am using 0 for criteria that have not (yet) been tested. A score of 1 to 3 indicates poor performance (and yes, it does), a score of 4 to 6 indicates average performance, a score of 7 to 8 indicates good performance, and a score of 9 and 10 indicates exceptional performance. .
The score is calculated based on my measurements and when there are no measurements, it is a subjective opinion based on my experience.

The scores are not static, they change over time because the performance of new products changes and this must be taken into account.

Unihertz Tank
Finish quality6.006.00
Battery performance8.58.00
CPU performance7.006.5
GPU performance7.006.5
Screen quality6.007.00
Photo quality7.005.00
Video quality7.005.00
Wi-Fi performance7.007.00
Mobile download speed7.005.00
Mobile network sensitivity7.56.00
Frequency coverage7.007.00
Audio quality7.006.00
GPS performance7.006.00
Operating system8.008.00
Overall score9989
Global ranking
1. Black Shark 4 Pro 114 / 140
2. Realme Gt 112.5 / 140
3. Poco F2 Pro 111.5 / 140
4. Oneplus Nord 2t 111.5 / 140
5. Poco F5 111 / 140
6. Samsung Galaxy S20 111 / 140
7. Poco F4 Gt 110.5 / 140
8. Google Pixel 5 109.6 / 140
9. Poco F3 108.5 / 140
10. Poco X4 Gt 108 / 140
11. Google Pixel 6a 108 / 140
12. Poco X3 Pro 107.5 / 140
13. Samsung Galaxy S10+ 107 / 140
14. Xiaomi 11t 107 / 140
15. Redmi Note 11 Pro Plus 5g 106.5 / 140
16. Redmi Note 12 Pro 106 / 140
17. Xiaomi Mi 9t Pro 106 / 140
18. Xiaomi Redmi Note 10 Pro 105.5 / 140
19. Samsung Galaxy A52 104 / 140
20. Tcl 10 Pro 104 / 140
21. Xiaomi Mi 11 Lite 104 / 140
22. Redmi Note 11 Pro 103 / 140
23. Poco X4 Pro 102.5 / 140
24. Poco M4 Pro 4g 102 / 140
25. Xiaomi Redmi Note 10s 102 / 140
26. Poco M4 Pro 101.5 / 140
27. Unihertz Luna 101.5 / 140
28. Redmi Note 11 101 / 140
29. Xiaomi Mi 10 Lite 5g 101 / 140
30. Poco X3 101 / 140
31. Xiaomi Redmi Note 10 101 / 140
32. Xiaomi Mi Note 10 Lite 101 / 140
33. Redmi Note 9t 100.5 / 140
34. Xiaomi Redmi Note 8 Pro 100 / 140
35. Unihertz Tank 99 / 140
36. Poco X5 5g 98.5 / 140
37. Poco M5 98.5 / 140
38. Xiaomi Mi 9 Lite 98 / 140
39. Doogee S96 Pro 98 / 140
40. Xiaomi Redmi Note 9s 98 / 140
41. Poco F4 98 / 130
42. Poco M3 Pro 98 / 140
43. Redmi 10 97.5 / 140
44. Xiaomi Redmi Note 8 97 / 140
45. Redmi Note 12 95.5 / 140
46. Umidigi Bison Pro 95 / 140
47. F150 R2022 95 / 140
48. Poco M3 94.5 / 140
49. Xiaomi Redmi Note 7 94 / 140
50. Realme 6 93 / 140
51. Umidigi A9 Pro 92 / 140
52. Umidigi Bison 92 / 140
53. Tcl 30 Se 92 / 140
54. Oukitel C21 89.5 / 140
55. Motorola G8 Power 89 / 140
56. Xiaomi Redmi Note 9 89 / 140
57. Nokia 5.3 89 / 140
58. Xiaomi Mi A3 89 / 140
59. Oneplus Nord N100 88.5 / 140
60. Honor 9x 88 / 140
61. Redmi 10a 88 / 140
62. Xiaomi Mi 8 Lite 86 / 140
63. Meizu Note 9 86 / 140
64. Xiaomi Redmi Note 5 85 / 140
65. Umidigi S3 Pro 83 / 140
66. Umidigi F2 82 / 140
67. Samsung Galaxy A21s 82 / 140
68. Redmi 9a 81 / 140
69. Oukitel Wp18 81 / 140
70. Redmi 9c 80 / 140
71. Ulefone Armor 7e 80 / 140
72. Doogee S58 Pro 78.5 / 140
73. Honor 8x 78 / 140
74. Umidigi F1 77 / 140
75. Huawei Y6 2019 74 / 140
76. Xiaomi Mi 10t Pro 57 / 70
77. Samsung Galaxy S23 8 / 10
78. Elephone U5 0 / 0

Test / Review conclusion

[b]There aren't many rugged phone reviews on the internet and that's a shame because some of these phones are definitely worth checking out and this Unihertz Tank is one of them. It's by far the most massive and heaviest phone I've tested, but it's an assumed choice to be able to carry a 22,000 mAh battery, it's almost a survival phone. Beyond its brutal appearance, it's a very powerful phone with a good photo sensor and good sound quality. It therefore manages to bring together the world of rugged smartphones with that of traditional smartphones, so you no longer have to make any sacrifices. [b][b] This phone positively surprised me on several levels. It is capable enough to play most games and its huge battery allows you to play for a very long time without overheating problem. Network sensitivity is also very good which can be useful if you are using this phone in places with poorer network coverage. The screen is really very large despite the edges, it does not have exemplary colorimetry but the protection certainly plays a role. The sound level in calls is above average and the sound quality through headphones is excellent. The GPS offers above average accuracy. [b][b] back to my zombie invasion example from the beginning of this article, I can now say that this phone is the best candidate. If you are the sole survivor, you will survive longer with this phone. All the ingredients necessary for survival are there: good GPS, good network sensitivity, good autonomy, solidity, very powerful flash lamp, night vision (up to 10-15m), ... and if you have a little time left to kill, you will also be able to play with this phone. [b][b][b]Strengths[b]Durability [b] Screen size [b] 4G network sensitivity [b] GPS signal [b] Performance [b] Sound quality [b] Call volume [b] Video stabilization [b] Battery [b][b][b]Weaknesses[b]Weight [b] Size [b] Colorimetry [b] External speaker sound quality [b] Photo [b][b][b]Alternatives to this product[b][b]Not yet available / tested[b][b]

laurent willen Laurent Willen
Instead of watching nonsense on TV or YouTube, I spend my time in the evenings testing products and sharing my passion for technology, travel and photography.

I run this site in my own name and completely independently, no one pays me to do so.

I have more than 20 years of experience in the digital world, I have managed and developed many high traffic websites in companies in Belgium such as Mobistar, Microsoft, Immoweb, BrusselsAirlines, Proximus, Orange,...


Join the discussion / Ask your questions

Your comment will be published after validation. I respond to over 1500 comments a year in my spare time, so I can't always respond very quickly. Your email address will not be publicly visible and it will not be used for commercial purposes.

Be notified by email when a response is published