Microsoft Lumia 640 Xl Lte Dual Sim has display Size 5.7", 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 13 MP is awesome, front camera 5 MP is also not bad. Lumia 640 Xl Lte Dual Sim has power storage, Up to 31 h 20 min (2G) / Up to 23 h 40 min (3G). Device status is Available