Asus Zenfone 3 has display Size 5.5", operating system Android 6.0.1, up to 7.0; ZenUI 3. The device has ram 4 GB too, card support is microSD, up to 256 GB (uses shared SIM slot), it has 64 GB, 4 GB RAM or 32 GB, 3 GB RAM hard disk. Back camera 16 MP is awesome, front camera 8 MP is also not bad. Zenfone 3 has power storage, . Device status is Available