Microsoft Lumia 550 has display Size 4.7", operating system Microsoft Windows 10. 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 5 MP is awesome, front camera 2 MP is also not bad. Lumia 550 has power storage, Up to 16 h (2G) / Up to 14 h (3G). Device status is Available