| Hardware and OS Ulefone Armor 21 |
| Operating system: | Android 13 |
| Processor: | Mediatek MT8781 Helio G99 |
| GPU: | Mali-G57 MC2 |
| RAM: | 8 GB |
| Internal Storage: | 256 GB |
| Memory Card Slot: | microSDXC (dedicated slot) |
| User Interface: | Yes |
| Display Ulefone Armor 21 |
| Type: | IPS LCD |
| Size: | 6.58 inches |
| Resolution: | 1080 x 2408 pixels |
| Colors: | 16M Colors |
| Pixel Density: | 401 ppi |
| Touchscreen: | Yes |
| Features: | 120Hz |
| Connectivity Ulefone Armor 21 |
| 4G Network: | 1, 2, 3, 4, 5, 7, 8, 12, 17, 19, 20, 28, 34, 38, 39, 40, 41, 66 |
| 5G Network: | No |
| Wi-Fi: | Wi-Fi 802.11 a/b/g/n/ac, dual-band |
| GPS: | GPS, GLONASS, GALILEO, BDS |
| NFC: | Yes |
| USB: | Type-C 2.0 |
| Speed: | HSPA, LTE |
| SIM: | Nano SIM |
| Dual SIM: | Yes |
| Wireless Charging: | No |
| Camera Ulefone Armor 21 |
| Main camera: | 64 MP (wide), 24 MP (night vision) |
| Features: | Yes |
| Image: | 2160p |
| Selfie camera: | 16 MP (wide) |
| Multimedia Ulefone Armor 21 |
| Loudspeaker: | Yes |
| Handsfree: | Yes |
| Radio: | Yes |
| Video Playback: | Yes |
| Video Out: | Yes |
| Ring Tones: | Yes |
| 3.5 mm Jack: | Yes |
| Design Ulefone Armor 21 |
| Dimensions: | 176 x 81.6 x 18.1 mm |
| Waterproof: | IP68/IP69K dust/water resistant (up to 1.5m for 30 min) |
| Weight: | 400 grams |
| Battery Ulefone Armor 21 |
| Capacity: | Li-Po 9600 mAh, 33W wired |
| Placement: | Non-removable |
| Other Ulefone Armor 21 |
| Sensors: | Side-mounted fingerprint, accelerometer, proximity, compass, gyro, barometer, |
