I downloaded iOS 6.1 from a direct link and tried to restore my iPhone 4s from iTunes using (shift+restore). It was halfway complete when I got this error (-1) and my phone got stuck in recovery mode. Now whenever I connect my iPhone to my PC, iTunes show that I need to restore my iPhone but when I do I get the same error every single time. I have tried restoring on my Laptop, PC and my friend's Laptop but every time I get the same error. Now the main thing is my iPhone is gifted and came from another country hence it cannot be replaced here in India. Please help guys, all the help will be highly appreciated.