I have this problem, with android 4.2.2 for my samsung galaxy s2 plus device, after I updated the old 4.1.2 with samsung kies.. I was using the 4.2.2 fine with no problems... untill my device rebooted out of the blue. And so it started rebooting constantly every 1-2 hours or so... And I was wondering if anyone could tell me where the problem is... I tried various firmwares from samfirmware.com flashed with odin did factory reset. nothing helped. but the funny thing is once I flashed back to 4.1.2 android device worked perfectly fine, no reboots. I really want to use the new 4.2.2 but it irritates me that it constantly reboots the device. Maybe some of you have encountered the same problems? anyone could help?