B I just fixed my friend's iphone 4. I have tried 10 times but there was no chance to be successfully restore. Finaly, what am i doing is get a plastic bag, put your iphone into it, and put the plastic bag in the freezer. Make sure there is no water in the plastic bag. After that, just watch your tv, play your game or do anything else for about 1 hour. After that, don't waste your time, don't wait till it's hot, don't wait anything just restore it, and may God bless your iphone. It worked for me, and my friend just speechless because he nearly wanted to waste a lot of money to service his iphone. Good luck with that, hopefully this may be useful. My suggestion, don't use iphone :). Thank you