Nokia Lumia 830 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 16 GB, 1 GB RAM hard disk. Back camera 10 MP is awesome, front camera 0.9 MP is also not bad. Lumia 830 has power storage, . Device status is Available