Microsoft Lumia 640 Lte has display Size 5.0", operating system Microsoft Windows Phone 8.1. The device has ram 1 GB too, card support is microSD, up to 256 GB (dedicated slot), it has 8 GB, 1 GB RAM hard disk. Back camera 8 MP is awesome, front camera 1 MP is also not bad. Lumia 640 Lte has power storage, Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G). Device status is Available