Technical sheet of Ulefone Armor 21


Ulefone Armor 21 – Pushing the Limits of Mid-Range Smartphones

Ulefone, a leading player in the world of smartphones, has unveiled its newest mid-range device, the Ulefone Armor 21. The phone is set to be released in May 2023, so it’s already garnering a lot of attention from tech enthusiasts and mobile aficionados alike.

Design and Materials

The Armor 21 has been built with an LCD IPS screen at 6.58 inches, and a resolution of 1080x2408 (FHD+). As well as this, it offers a 120hz refresh rate for those who enjoy smooth game-play on their device. Its 77.4% usable surface makes for ease of use, while the polycarbonate body makes for a sturdy and robust phone. What’s more, Ulefone have included a rugged feature in the form of a unique protective covering which increases resistance to falls and rain.


One exciting aspect of the Ulefone Armor 21 is its audio. With one of the loudest speakers currently available (122db), a 3.5W peak wattage, smart PA high volume boost, and a 36mm speaker diameter, you can be sure that no matter what type of media you’re playing on your phone, it will be heard clearly. Additionally, Ulefone included an 11.5cc-equivalent large sound cavity design to optimize sound quality for its users.


As expected from a mid-range device, the Ulefone Armor 21 has some impressive hardware specs. It’s powered by a MediaTek Helio G99 (MT6789) processor, with a 6nm architecture. This processor is paired with 8GB LPDDR4X RAM, and 256GB UFS Storage 2.1. It’s also equipped with a side-mounted fingerprint sensor, for an added level of security.


In terms of camera set-up, the Armor 21 provides a Sony IMX686 Exmor RS with a 64.0MP shot. This includes an f/1.9 aperture and a CMOS sensor. For taking shots in low-light environments, Ulefone included a night vision camera, with 20.0MP and an f/1.8 aperture. On the front, you get a Sony IMX481, with 16.0MP and an f/2.2 aperture.


When it comes to connectivity, the Ulefone Armor 21 is no slouch either. It comes with Bluetooth 5.2, dual SIM, NFC, audio jack, infrared, Endoscope E1, uSmart E02, and a uSmart C01 Supermicroscope. Allowing you to connect to a wide range of devices, these features should be more than enough for most users.


Like any modern smartphone, the Ulefone Armor 21 is equipped with a hefty battery. Coming in at 9600mAh, the device has a fast charge time of 33.0W. This should allow you to power through your day without the worry of running out of juice quickly.


Overall, the Ulefone Armor 21 looks to be a solid mid-range device. With an impressive array of features, and a top tier hardware spec, the phone should provide a great experience for fans of mid-range devices. It’s set to release in May 2023, so until then, keep an eye out for leaks and more information about this impressive offering from Ulefone.

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Brand Ulefone
Best Sellers
Smartphones by Ulefone

Ulefone Armor 21 prices

Versions and prices
Ulefone Armor 21 Global · 8GB · 256GB $ 205

Release Date

Release dateMay 2023, 1 year ago



Design & Materials of Ulefone Armor 21

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81.6 mm176.0 mm18.1 mm
Print 3D Model
Weight 400 g
Usable surface 77 %
Materials Rugged Smartphone, Polycarbonate
Resistance certificates (dust, water) IP68, IP69K , MIL-STD-810H


Aspect Ratio 20:9
Resolution 1080 x 2408 px FHD+
Density 367 ppi High Density
  • Water Drop Notch
  • Refresh rate 120 Hz
  • Touch sampling rate 240 Hz
  • Color LED Notifications
  • Scratch resistant
  • Capacitive
  • Multi-touch
  • Oleophobic coating
Best big screen mobilesBest phones with IPS screen
122dB HiFi Quality Loudest Speaker
3.5W peak wattage
Smart PA high volume boost
36 mm speaker diameter
11.5cc-equivalent large sound cavity design
Number of LED lights: 18
Color: RGBMode: Music, Calling, Notification, Charging
Lighting modes: 10 types

Performance & Hardware of Ulefone Armor 21


Model MediaTek Helio G99 (MT6789)
CPU 2x CortexA76 2.2 GHz + 6x CortexA55 2.0 GHz
Type Octa-Core
Nanometer 6 nm
Frequency 2.2 GHz
64 Bits Yes
More smartphones with Mediatek Helio G99 processor


GPU Mali-G57 MC2


More smartphones with 8GB RAM memory


411.900 Antutu v10
Overall performance better than 72% of devices


Capacity 256 GB
Type UFS Storage 2.1
SD Slot Yes , Independent SD slot
More smartphones with 256GB of internal storage


Fingerprint Yes, on the side


Fingerprint Yes
Proximity Yes
Light sensor Yes
Accelerometer Yes
Compass Yes
Gyroscope Yes
Barometer Yes
Gravity Yes
Geomagnetic Yes
Pedometer Yes
Coulometer Yes
Notifications LED Color LED Notifications
Cooling system No
Gaming buttons No

Camera of Ulefone Armor 21

Rear camera

Resolution 64 Mpx
Sensor Sony IMX686 Exmor RS
Aperture ƒ/ 1.9
ISO --
Pixel size 0.80 µm
Pixel Binning 1-4 (2x2)
Sensor size 1/1.7"
Flash Dual LED
Optical Stabilisation No
Slow Motion Video No, 30 fps
  • Digital zoom
  • Autofocus
  • Touch focus
  • Phase detection autofocus (PDAF)
  • Continuous shooting
  • Geotagging
  • Panorama
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer
More smartphones with IMX686 Exmor RS lens modelMore smartphones with Dual LED


Resolution 16 Mpx
Sensor Sony IMX481
Aperture ƒ/ 2.2
Pixel size 1.00 µm
Sensor size 1/3.09"
Kimovil Frequency Checker

Network compatibility

Connectivity of Ulefone Armor 21


4G LTE B1 (2100), B2 (1900), B3 (1800), B4 (1700/2100 AWS 1), B5 (850), B7 (2600), B8 (900), B12 (700), B17 (700), B18 (800), B19 (800), B20 (800), B28b (700), B28a (700), B34 (TDD 2100), B38 (TDD 2600), B39 (TDD 1900), B40 (TDD 2300), B41 (TDD 2500), B66 (1700/2100)
3G B1 (2100), B2 (1900), B4 (1700/2100 AWS A-F), B5 (850), B8 (900)
2G CDMA BC0 (800), CDMA BC1 (1900), B2 (1900), B3 (1800), B5 (850), B8 (900)

SIM card

TypeDual SIM Dual Standby (Nano SIM + Nano SIM)

SIM cards (MiniSIM) can be cut to MicroSIM, MicroSIM can be cut to NanoSIM and a SIM can even be cut to a NanoSIM (although not recommended). Download this SIM Cutting Template and forget about having to ask your operator for a new SIM...


Standards 802.11a , 802.11b , 802.11g , 802.11n , 802.11n 5GHz , 802.11ac
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi Display


Version Bluetooth 5.2 LELow energy consumption
  • A2DP (Advanced Audio Distribution Profile)
  • LE (Low Energy)


Supports GPS, A-GPS, GLONASS, Beidou, Galileo


Charging Yes
Mass Storage Yes
USB On-The-Go (OTG) Yes
USB Type C Yes
USB Host 2.0 Yes


-- --
Audio Jack
Radio FM
Computer sync
OTA sync
uSmart Expansion
  • Endoscope E1
  • uSmart E02 Endoscope
  • uSmart C01 Supermicroscope

Battery of Ulefone Armor 21

9600 mAh
Type Li-Ion
Fast charge Yes , 33.0W
  • Non-removable

Software of Ulefone Armor 21


Operating System Android 13 Tiramisu
Android 13
Google Services (official) Yes
More smartphones with Android 13 operating system

User reviews about the Ulefone Armor 21

Overall satisfaction
Not enough reviews
3 reviews
  • Screen7.8
  • Performance8.0
  • Camera8.7
  • Connectivity7.3
  • Battery9.7
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Latest reviews added

  • Horrible DATA Connection

    When I been a UleFone fan for a couple of years and had multiple devices from them.

    This armor21 however is extremely disappointing. It does not want to connect to the 4G network and it is also extremely slow while connecting to the 3G network I had to switch carriers to see if that would resolve the issue and unfortunately it did not now I'm stuck with this phone for the foreseeable future until they provide some sort of update that allows us to connect properly to both 4G and 3G.

    It is also disappointing that this is their flagship device and it does not connect to the 5G Network which is what is standard now amongst most phones.

    The software also has numerous bugs and I had to restart the phone factory restart the phone I should say multiple times now.

    Customer service on this phone is extremely slow and they do not want to help I sent them videos of the phone glitching out and they told me that it wasn't a uniform until I sent them a video showing them the model and name on the back of the device.

    Overall I'm very disappointed and I do not recommend this brand I'll be looking for a new rugged phone

    • 1.8
    • Screen5.7
    • Performance5.0
    • Camera8.5
    • Connectivity3.6
    • Battery9.0
  • Auto
    Excellent durability and sound

    The cell phone is very resistant, the battery lasts a long time, it is a mid-range and it works correctly.

    • Battery
    • Endurance
    • Excellent sound
    • 10
    • Screen8.7
    • Performance9.6
    • Camera9.2
    • Connectivity9.3
    • Battery10
  • Auto
    The device really surprises!

    Excellent device, the 120Hz screen update brings great comfort to the eyes, GPS connects very quickly, WIFI connects easily, telephony has not yet failed, the sound is truly incredible and it is very resistant to falls. The device is very beautiful and impresses people around it. It was worth every penny!

    • 8.9
    • Screen9.0
    • Performance9.3
    • Camera8.2
    • Connectivity9.0
    • Battery10


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Questions · FAQ

Frequently asked questions about the Ulefone Armor 21.

What are the features of the Ulefone Armor 21?

These are the main features and specifications of the Ulefone Armor 21:

  • Screen: 6.58" LCD IPS
  • Resolution: 1080 x 2408 px · FHD+
  • RAM: 8GB
  • Storage: 256GB
  • Processor: MediaTek Helio G99 (MT6789)

What is the price of Ulefone Armor 21?

The Ulefone Armor 21 price in United States is 204$.

    How long does the battery of the Ulefone Armor 21 last?

    The Ulefone Armor 21 battery has a capacity of 9600 mAh.

    In which colors is the Ulefone Armor 21 available?

    The Ulefone Armor 21 is currently only available in Black.

    When was the Ulefone Armor 21 release date?

    The Ulefone Armor 21 was unveiled on Saturday, May 20, 2023.

    Which camera does the Ulefone Armor 21 have?

    The Ulefone Armor 21 has a rear camera and its main sensor is Sony IMX686 Exmor RS with a resolution of 64Mpx.

    The information on this web site is not guaranteed. Kimovil is not responsible for inaccuracies, omissions or any other error in the information. Any warranties regarding this information are disclaimed. Total or partial reproduction of this site is prohibited in any manner without prior written permission. The trademarks, logos and device manufacturers, software, etc. are the property of their respective owners.

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    February 28, 2024
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    • Aspect Ratio 3 months ago
    • New opinion 4 months ago
    • Photos, Photos, Features 1 year ago
    • SAR, SAR 1 year ago
    • Usable surface, Resolution, Camera, Camera, Camera, Sensor Model, Camera, Camera 1 year ago
    • Density 1 year ago
    • Name, Width, Height, Thickness, Weight, Inches, Capacity (mAh), Operating System 1 year ago
    Ki Cost-effective
    • 6.2 Design & Materials
    • 6.8 Performance & Hardware
    • 6.2 Camera
    • 7.5 Connectivity
    • 9.1 Battery
    What is a Ki score?
    Ki is an automatic score based on the specifications and prices of devices. It is calculated using over 200 variables to rank smartphones, tablets and other devices from best to worst.
    How do we calculate the Ki?

    In this case, to determine the score we evaluate 5 general aspects:

    • Design and screen
    • Hardware and performance
    • Camera
    • Connectivity
    • Battery

    Once these 5 factors have been rated, we introduce the price variable. This means that any two devices with the same ratings get a different Ki score for quality vs price.

    Even a device objectively worse than another may have a higher Ki score if it has a better price.

    Does the Ki score change?

    The Ki varies as time goes by. As new devices with better specifications enter the market the Ki score of older devices will go down, always being compensated of their decrease in price.