Nokia announced its first Windows RT tablet, the Lumia 2520, in October. The tablet was recently released and some customers have complained about a sleep mode bug that causes the tablet to become inoperable until the user performs a hard reset. The issue is reportedly being faced by both AT&T and Verizon variants of the device, and quite a lot of users have complained about the exact same issue in Nokia's official discussions forums. Users who left comments on the forum speculate that the bug might be related to the display drivers, however Nokia is yet to issue a statement regarding the bug.
Ubergizmo , Nokia Lumia 2520 Sleep Mode Bug Haunts Users, Nokia Lumia 2520 Sleep Mode Bug Haunts Users