[Q] Galaxy S3 I9300 got stuck/freezes

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http://forum.xda-developers.com – Hi everybody. I got a problem with my S3 I9300. The thing is that it is stuck/freezes very frequently during the day. Sometimes it doesn't wake up from deep sleep (neither if I hit the home button nor the power on/off button) and sometimes it just reboots and I have to enter the SIM PIN. I really have no clue what the hell is wrong - it worked like a charme until this thing started (about one week ago). After I reboot the device it is working for ... I cannot say exactly. Hours? Minutes? During the night it seems like there is no problem - because if it would freeze/reboot I would no (HowTos)