2 days ago my Iphone 4s suddenly disconnected from my carrier and in the top right corner it just said 'Searching...'. I thought it was a problem with my vodafone sim card, so i got a replacement one, it still didn't work, so i tried it in my friends iphone 4 and it worked! So obviously now i know it is a problem with my Iphone. That same day i pop into my local Apple store and a worked there said i should try to restore my Iphone and hopefully it will reset the phone and therefore pick up signal again. So i restored my iphone on my itunes when i got home, it gets halfway through the restore until it reaches firemware and then suddenly it stops the restore and says there is an unknown error. (error code -1) Since then my phone is now stuck in recovery mode and will always get stuck on the firmware part of the restore. I've tried multiple ways of restoring the iphone and getting it out of recovery mode with recboot etc, but nothing seems to work. If anyone has had the problem before or knows how to fix it i would greatly appreciate your help/advice.