Asus Zenfone 3s Max has display Size 5.2", operating system Android 7; ZenUI 3. The device has ram 3 GB too, card support is microSD, up to 256 GB (uses shared SIM slot), it has 32 GB, 3 GB RAM hard disk. Back camera 13 MP is awesome, front camera 8 MP is also not bad. Zenfone 3s Max has power storage, Up to 28 h (3G). Device status is Available