Tried to update my 3GS phone with AT&T GO card with 4.3.4 from 4.3.3 Never had jailbreak before. Install failed and when into recovery mode but it will not complete with error code 29 which apple store says is hardware failure. I have replaced the battery and digitizer screen but it was working great before today. Is there anyway to re-install 4.3.3 image? Where can I get it? Is it on my PC? I tried fixed recovery and it appears it was succesful. But when I used itunes to recovery it still fails Help? What tools do I need now?