Asus Zenfone 2 has display Size 5.5", operating system Android 5.0, up to 6.0. The device has ram 4 GB too, card support is microSD, up to 256 GB (dedicated slot), it has 16/32/64 GB, 2/4 GB RAM hard disk. Back camera 13 MP is awesome, front camera 5 MP is also not bad. Zenfone 2 has power storage, . Device status is Available