I know there have been many threads like this one, but I have never seen someone with the issue I have. I have LG TrueHD LTE p936 (equivalent of LG Nitro HD) and it comes with stock 2.3.6 Gingerbread. I have updated it to ICS 4.0.4 by using non official methods since they didn't work, but I have flashed an official kdz. Thing is now phone randomly shuts off in middle of work or middle of idk unlocking... it is random. It shuts off and it won't turn on. I hold the power button for like 30 seconds and nothing. Then I have to pull the battery out and put it back to turn on the phone. I did factory reset 2 times on ICS, and the problem is still here. Can anyone tell me what to do?