Hi, I'm experiencing some problems with restoring my iphone4. It's not jailbroken, and all the updates were done through itunes.
As I conect the iphone to itunes, it shows a message saying there's and iphone who needs to be restored. As I begin the restoration process, it stops at the 15 per cent of the process, and it appears a message on itunes with "error -1". I've already tried the troubleshooting, pressing both buttons, but it's still not working, and the phone doesn't recover.