| Hardware and OS | Oppo A55 4G | |
| Operating system | Android v11 | |
| Processor | MediaTek Helio G35 | |
| RAM | 4 GB | |
| Internal Storage | 64 GB | |
| Expandable memory | Yes, Upto 256 GB | |
| Custom UI | ColorOS | |
| Display | Oppo A55 4G | other phones |
| Type | LCD HD | |
| Size | 6.51 inches | |
| Resolution | 1600 x 720 Pixels | |
| Pixel Density | 270 ppi | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | |
| Aspect ratio | 20:9 | |
| Refresh rate | 120 Hz | |
| Screen to body ratio calculated | 82.62 % | |
| Connectivity | Oppo A55 4G | other phones |
| Network support | 4G , 3G, 2G | |
| WI-FI | Yes, Wi-Fi 802.11, a/ac/b/g/n/n 5GHz | |
| Gps | Yes, with A-GPS, Glonass | |
| Bluetooth | Yes, v5.0 | |
| Dual SIM | Dual SIM, GSM GSM | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| USB TYPE-C | Yes | |
| USB connectivity | Mass storage device, USB charging | |
| Camera | Oppo A55 4G | other phones |
| Main camera | 50 MP 2 MP 2 MP | |
| Image | 8150 x 6150 Pixels | |
| Front camera | 16 MP | |
| Front camera resolution | 16 MP f/2, Wide Angle Primary Camera | |
| Camera features | Yes | |
| Flash | Yes, LED Flash | |
| Autofocus | Yes | |
| Video recording | 1920x1080 @ 30 fps, 1280x720 @ 30 fps | |
| Multimedia | Oppo A55 4G | other phones |
| Audio jack | 3.5 MM | |
| Loudspeaker | Yes | |
| Design | Oppo A55 4G | other phones |
| Height | 163.6 mm | |
| Width | 75.7 mm | |
| Thickness | 8.4 mm | |
| Weight | 193 grams | |
| Colours | Starry Black, Rainbow Blue | |
| Waterproof | Yes, Splash proof, IPX4 | |
| Battery | Oppo A55 4G | other phones |
| Capacity | 5000 mAh | |
| Type | Lithium Polymer | |
| Quick charging | Yes, Fast, 18W: 33 % in 30 minutes | |
| Other | Oppo A55 4G | other phones |
| Fingerprint sensor | Yes | |
| Fingerprint sensor position | Side | |
| Other sensors | Geomagnetic Sensor, Light Sensor, Proximity Sensor, Accelerometer, Gravity Sensor | |
