| Hardware and OS | UMIDIGI A3 | |
| Operating system | Android 8.1 Oreo | |
| Processor | ARM Cortex-A53, 1500 MHz, Cores: 4 | |
| GPU | PowerVR GE8100, 570 MHz | |
| RAM | 2 GB, 667 MHz | |
| Internal Storage | 16 GB | |
| Memory Card Slot | microSD, microSDHC, microSDXC | |
| User Interface | Yes | |
| Display | UMIDIGI A3 | other phones |
| Type | IPS | |
| Size | 5.5 inches | |
| Resolution | 720 x 1440 pixels | |
| Colors | 16M | |
| Pixel Density | 293 ppi | |
| Touchscreen | Yes | |
| Protection | 2.5D curved glass screen | |
| Features | Capacitive, Multi-touch | |
| Connectivity | UMIDIGI A3 | other phones |
| 4G Network | Yes | |
| Wi-Fi | a, b, g, n, n 5GHz, Dual band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display | |
| GPS | GPS, A-GPS, GLONASS, BeiDou | |
| NFC | No | |
| USB | 2.0, Micro USB | |
| Speed | LTE 700 MHz Class 13 LTE 700 MHz Class 17 LTE 800 MHz LTE 850 MHz LTE 900 MHz LTE 1700/2100 MHz LTE 1800 MHz LTE 1900 MHz LTE 2100 MHz LTE 2600 MHz LTE-TDD 2300 MHz (B40) LTE-TDD 2500 MHz (B41) LTE-TDD 2600 MHz (B38) LTE 700 MHz (B12) LTE 800 MHz (B19) | |
| SIM | Nano SIM | |
| Dual SIM | Nano-SIM, Nano-SIM / microSD | |
| Wireless Charging | No | |
| Camera | UMIDIGI A3 | other phones |
| Main camera | 12.19 MP (megapixels) | |
| Features | Dual LED | |
| Image | 4032 x 3024 pixels | |
| Selfie camera | 7.99 MP (megapixels) | |
| Multimedia | UMIDIGI A3 | other phones |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Radio | Yes | |
| Video Playback | Yes | |
| Video Out | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | yes | |
| Design | UMIDIGI A3 | other phones |
| Dimensions | 70.2 x 147.2 x 8.5 mm | |
| Waterproof | No | |
| Weight | 186 g | |
| Battery | UMIDIGI A3 | other phones |
| Capacity | 3300 mAh, Li-Polymer | |
| Other | UMIDIGI A3 | other phones |
| Sensors | Proximity, Light, Accelerometer, Compass, Gyroscope, Fingerprint | |
