Asus Zenfone 4 Selfie has display Size 5.5", operating system Android 7.0, up to Android 8.1; ZenUI 5. The device has ram 4 GB too, card support is microSD, up to 256 GB (dedicated slot), it has 64 GB, 4 GB RAM hard disk. Back camera 13 MP is awesome, front camera 13 MP is also not bad. Zenfone 4 Selfie has power storage, . Device status is Available