Tried to upgrade to 4.3.1, now stuck in DFU mode. Help!
I have an iPhone3GS running old bootrom with bb 04.28.06. I was previously on ios 4.2.1 and created a custom firmware for 4.3.1 using sn0wbreeze 2.5.
Unfortunately my phone is stuck in DFU mode (black screen). When I try to restore to any old custom firmware I will get the error 1600. I have used iReb and it will detect that I'm already in DFU mode hence I know its stuck there.
I've tried using TinyUmbrella to restore to older custom firmware which I have the SHSH to but still no use.
I've also tried holding power and home button to get out of DFU but once it exits DFU mode it will auto go back into the mode ie. the screen remains black.
Can anyone help me get my phone back in action. If you need any more info please ask.