OPPO A31, 11.4 cm (4.5"), 1 GB, 8 GB, 8 MP, Android 4.4, Blue OPPO A31. Display diagonal: 11.4 cm (4.5"), Display resolution: 480 x 854 pixels. Processor frequency: 1.2 GHz, Processor family: Snapdragon, Processor model: 410. RAM capacity: 1 GB, Internal storage capacity: 8 GB. Rear camera resolution (numeric): 8 MP, Rear camera type: Single camera. SIM card capability: Dual SIM. Operating system installed: Android 4.4. Battery capacity: 2000 mAh. Product color: Blue. Weight: 135 g