I use an iPhone 5 that is jail-broken. Recently, I've decided that I wanted to update my iPhone to ios8.1 (and then re-jailbreak it). So I backed it up in spite that I could to restore it to its factory settings, I didn't google how or anything, and I think I should've turned off "Find My iPhone," but I didn't. And every time I press restore, iTunes extracts the software, starts to restore, and in the end, fails and tells me that it couldn't restore my iPhone. Please help me, now my iPhone is staying on the "Connect to iTunes" screen and I'm unsure of what to do.