Htc U Ultra has display Size 5.7", operating system Android 7.0, up to Android 8.0. The device has ram 4 GB too, card support is microSD, up to 512 GB (uses SIM 2 slot), it has 64/128 GB, 4 GB RAM hard disk. Back camera 12 MP is awesome, front camera 16 MP is also not bad. U Ultra has power storage, . Device status is Available