Oppo A91 has display Size 6.4", operating system Android 9.0; ColorOS 6.1. The device has ram 8 GB too, card support is microSD, up to 256 GB (dedicated slot), it has 128GB 8GB RAM hard disk. Back camera 48 MP is awesome, front camera 16 MP is also not bad. A91 has power storage, . Device status is Available