Asus Zenfone 4 Selfie Pro has display Size 5.5", operating system Android 7; ZenUI 4. The device has ram 4 GB too, card support is microSD, up to 256 GB (uses shared SIM slot), it has 64 GB, 3/4 GB RAM hard disk. Back camera 16 MP is awesome, front camera 12 MP is also not bad. Zenfone 4 Selfie Pro has power storage, . Device status is Available