Oppo A31 has display Size 6.5", operating system Android 9.0; ColorOS 6.1. The device has ram 4 GB too, card support is microSDXC (dedicated slot), it has 128GB 4GB RAM hard disk. Back camera 12 MP is awesome, front camera 8 MP is also not bad. A31 has power storage, . Device status is Available. Released 2020, February 14