Hi guys. I just bought 2 Nexus 4 for me and my girlfriend. Mine runs solid and no problems out of the box. But hers was fine until 4.2.2 upgrade. It has been randomly rebooting at least 10 to 15 times a day. It is fine when using but it seems to be rebooting at random time when not using as much. Here are the several cases of reboot. One is, we were talking on the phone for about 2 to 3 hours and we were playing game, browsing internet, at the same time, it was fine. Then after we hang up, it reboots. Another case is, she would leave it and not use the phone for a while and it would reboot. Happens regularly at least once at night. It's just hard to pinpoint the problem and I have tried reflashing stock 4.2.2 on it but still no luck. I've tried turning off BT, Wifi, GPS. Still no luck. Also, after turning off Wifi, it didn't reboot but have not tested for extended period of time. Without wifi, it's kind of useless since she doesn't have data plan. Has anyone suffered this on their phone and can custom ROM fix this? The phone hasn't been rooted or anything. It's still stock. EDIT: Sorry if this is a repost. I couldn't search for similar topic on forums.