| Hardware and OS | iQOO U3 128GB 8GB RAM | |
| Operating system | Android v10 (Q) | |
| Processor | Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) | |
| Chipset | MediaTek Dimensity 800U 5G (7 nm) | |
| Internal Storage | 128 GB | |
| GPU | Mali-G57 MC3 | |
| RAM | 8 GB | |
| Camera | iQOO U3 128GB 8GB RAM | other phones |
| Main camera | 48 MP 2 MP | |
| Autofocus | Yes | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Front camera | 20 MP | |
| Front camera resolution | 20 MP, f/2.0, (wide) | |
| Video recording | Yes | |
| Connectivity | iQOO U3 128GB 8GB RAM | other phones |
| Bluetooth | Yes, v5.0 | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| Dual SIM | Dual SIM, GSM GSM | |
| GPS | Yes, with A-GPS, Glonass | |
| Network support | 5G , 4G , 3G, 2G | |
| USB connectivity | Mass storage device, USB charging | |
| WI-FI | Yes, Wi-Fi 802.11, b/g/n | |
| Multimedia | iQOO U3 128GB 8GB RAM | other phones |
| Audio jack | 3.5 MM | |
| Loudspeaker | Yes | |
| Battery | iQOO U3 128GB 8GB RAM | other phones |
| Capacity | 5000 mAh | |
| Type | Li-ion | |
| User replaceable | No | |
| Design | iQOO U3 128GB 8GB RAM | other phones |
| Colors | White, Gray, Aurora | |
| Features | iQOO U3 128GB 8GB RAM | other phones |
| Fingerprint sensor position | Side | |
| Fingerprint sensor | Yes | |
| Other sensors | Accelerometer, Proximity, Compass | |
