Detailed comparison and review of Ulefone Armor X3 and Samsung Galaxy A21s. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.
| DESIGN AND DIMENSIONS | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | SM-A217F/DSN | |
| Form Factor | Touch - Rugged | Touch | |
| Height | 158 mm | 163.7 mm | Samsung Galaxy A21s has greater height than Ulefone Armor X3. |
| Width | 77.5 mm | 75.3 mm | Ulefone Armor X3 has greater width than Samsung Galaxy A21s. |
| Depth | 13.85 mm | 8.9 mm | Samsung Galaxy A21s is narrower than Ulefone Armor X3. |
| Weight | 235 g | 192 g | Samsung Galaxy A21s is lighter than Ulefone Armor X3. |
| Body Colour | Silver | White | Blue | Black | |
| Body Material | Aluminium alloy, thermoplastic polyurethane (TPU) | - | |
| Protection | Dustproof, waterproof, drop-proof, splash-resistant | - | |
| Waterproof (Water-resistant) | Yes | - | Ulefone Armor X3 is waterproof. |
| IP rating | IP68, IP69K, IP69 | - | |
| SAR Value | 0.356 W/kg (body), 0.186 W/kg (head) | 1.544 W/kg (body), 0.422 W/kg (head), 2.21 W/kg (limb) | |
| Connector Type | Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Nano SIM + nano SIM/microSD | - |
| DISPLAY | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | IPS | PLS TFT | |
| Screen Size (Display Size) | 5.5" | 6.5" | Samsung Galaxy A21s has larger screen size than Ulefone Armor X3. |
| Screen Resolution (Display Resolution) | 1440 x 720 pixels | 1600 x 720 pixels | Samsung Galaxy A21s has better screen resolution than Ulefone Armor X3. |
| Display Format | HD+ | HD+ | |
| Pixel Density | 293 ppi | - | |
| Aspect Ratio | 18:9 | 20:9 | |
| Colour Depth | - | 16.7 million colours | |
| Display Features | - | Infinity O display |
| PROCESSOR | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Processor Type (CPU) | MediaTek | - | |
|---|---|---|---|
| Processor Number | MT6580 | - | |
| Clock Speed | 1.3 GHz | 2 GHz | Samsung Galaxy A21s has higher clock speed than Ulefone Armor X3. |
| Processor Core Qty | Quad-core | 8-core | Samsung Galaxy A21s has higher processor core quantity than Ulefone Armor X3. |
| MEMORY | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| RAM | 2 GB | 3 GB | Samsung Galaxy A21s has more RAM than Ulefone Armor X3. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 32 GB | Both phones have the same internal memory capacity. |
| User Memory | - | 19.5 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSDHC, microSDXC - up to 512 GB |
| CAMERA | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 8 Megapixel | 48 Megapixel | Samsung Galaxy A21s has better camera resolution than Ulefone Armor X3. |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.8 | F/2.0 | Ulefone Armor X3 has better lens aperture than Ulefone Armor X3. |
| Lens Construction | 5-element | - | |
| Field of View (FoV) | - | 80 degree(s) | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | - | 8x | |
| Camera Modes | Underwater mode | Live Focus mode | |
| Light Source | Dual LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | - | Live Focus |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 2 Megapixel | 8 Megapixel | Samsung Galaxy A21s has better second camera resolution than Ulefone Armor X3. |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Field of View (2nd Camera) | - | 123 degree(s) |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | 4cm macro photography |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.4 | |
| Camera Functions (4th Camera) | - | Depth camera |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 13 Megapixel | Samsung Galaxy A21s has better front camera resolution than Ulefone Armor X3. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | Ulefone Armor X3 has better front lens aperture than Ulefone Armor X3. |
| Lens Element Qty (Front) | 4-element | - | |
| Focus Adjustment | - | Focus free |
| BATTERY AND CHARGING | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 5000 mAh | Both phones have the same battery capacity. |
|---|---|---|---|
| Standby Time | 440 hours | - | |
| Talk Time | 1500 minutes | 3240 minutes | Samsung Galaxy A21s has longer battery life when making calls than Ulefone Armor X3. |
| Run Time Details | Talk: up to 1500 min Standby: up to 440 hrs Playback (Music): up to 34 hrs Playback (video): up to 9 hrs |
Active online usage (4G): up to 23 hrs Active online usage (Wi-Fi): up to 23 hrs Playback (video): up to 21 hrs Playback (audio): up to 109 hrs Talk (4G): up to 3240 min |
|
| Battery Technology | Lithium polymer | Lithium Ion |
| CELLULAR | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 3G | 4G | Samsung Galaxy A21s has more advanced generation mobile network. |
| Operating System | Android 9.0 Pie | - | |
| User Interface | - | One UI | |
| Navigation | GPS | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+ | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 2, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 850, 900 | |
| 4G LTE Band | - | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
| 4G LTE Frequency | - | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | IEEE 802.11b/g/n | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 4.0 | Bluetooth 5.0 LE | |
| NFC | - | Yes | Samsung Galaxy A21s has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Supported Digital Audio Standards | AAC, AMR, MP3, FLAC | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | |
|---|---|---|---|
| Supported Digital Video Standards | MPEG-4, 3GP | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | - | Dolby Atmos sound technology |
| FEATURES | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, digital compass, L-sensor, P-sensor | Accelerometer, proximity sensor, gyro sensor, geomagnetic sensor | |
| Security Devices | Face recognition | Face recognition, fingerprint reader | |
| Additional Phone Features | Face Unlock, Glove mode, customised button | Samsung KNOX, Virtual Light Sensing |
| OTHERS | Ulefone Armor X3 | Samsung Galaxy A21s |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool, tempered glass screen protector | Power adapter | |
|---|---|---|---|
| Compliant Standards | MIL-STD 810G, IP68, IP69K | - | |
| Max Depth of Water Resistance | 1.5 m | - | |
| Max Operating Temperature | 60 °C | - | |
| Min Operating Temperature | -20 °C | - |
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