Hey guys I've got a iphone 4 and I can't use it anymore cause Itunes after restoring process says 'can't restore device, -1 error'. I've been trying many many things, tinyumbrella, limer1, redsnow, restore with older ios, nothing works. I'd better let you know this iphone crashed during the io6 update process. The one thing that gets me worried is an -1 error is often associated with a hardware error. I gotta tell you there is no sim card in my iphone anymore, since it it crashed I cancelled my phone subscription thanks for taking the time to read me.