Allview Impera M has display Size 4.0", operating system Microsoft Windows Phone 8.1. 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 5 MP is awesome, front camera VGA is also not bad. Impera M has power storage, Up to 6 h 30 min. Device status is Available