Galaxy S3 won't boot, gets stuck at the "Samsung Galaxy S3 GT" screen
It might be a power button issue. when you take the battery out, and put it back in does the phone automatically turn on by itself? or do you have to press the power button to do that? You should turn it back on with the power button, if it turns back on automatically then it means your power button has gotten stuck. What I did was hold it and kept pressing it a few times in order for it to get unstuck. it'll turn on like normal once it's unstuck