Celkon A66 has display Size 4.5", operating system Android 4.1.2. The device has ram 512 GB too, card support is microSD, up to 32 GB, it has 4 GB, 512 MB RAM hard disk. Back camera 3.15 MP is awesome, front camera VGA is also not bad. A66 has power storage, Up to 5 h. Device status is Available