[Q] SG3 freezes when phone is in standby mode
I'm facing a very annoying issue with my Galaxy S3: it hangs when phone turns in standby mode and screen goes balck. From this point there is no option to wake up the phone besides holding the power button until it restarts. When the phone is in such state i can call to it but nothing happens. When I receive a message just before, The blue led blinks when the phone is frozen.
There is no coincidence beetwen these freeses and level of the battery.
Things i've tried so far:
1) upgdate firmware to 4.1.2 (for some reasons there was 4.0.4)
2) reset to factory settings
3) clear cache
4) my phone isn't affected with Sudden Death issue
Is there any wat to make my phone usable again?