help me,i cant exit downloading mode on my samsung galaxy s3.I was trying the home+power+volume down buttons,but nothing works...I even did remove the battery and the sd card,but nothing works....
Once you get to the download mode, press Volume Down. If that doesn't do it, Android is gone, and you'll have to reflash it (which you have to be able to get into download mode to do, so you can). See [Samsung] How to flash Stock ROM via ODIN.