Hi guys. I backed up my old unlocked iPhone 3G to my PC and then did the Erase option in the Settings menu, because I want to restore it to factory settings so I can sell it. I didn't know it was a mistake to do that, so I wondered why the iPhone was stuck at the Apple logo. I put it into recovery mode and tried to restore with iTunes but it gave me the error 1015. So I try to follow this tutorial - http://www.allaboutappleblog.com/2013/11/a-perfect-fix-for-itune-error-1015-for.html But my iPhone does not turn off. It's simply stuck on the "Connect iTunes screen". Following instructions to put it in DFU mode have failed. What shall I do? Any help would be appreciated.