Hi, I'm trying to fix an iPhone 4 for a coworker, someone unlocked it for her and in the process, Cydia and Safari were rendered useless. They both crash when trying to open them. It's a GSM AT&T iPhone 4 running iOS 5.1 baseband 04.12.01 on T-Mobile. I don't know how it was jailbroken or unlocked, I have been trying all night to restore it to 5.1, 5.1.1, a custom jailbroken 5.1.1 and nothing works. I kept getting an error ending in "This device in not eligible for the requested build. Edited my hosts and whatnot, after trying to follow another guide, I put the iPhone in DFU mode through redsn0w and ran a server through TinyUmbrella and tried restoring again through iTunes and this time got error 1600. From what I've read, it seems as though it's impossible to restore to iOS 5.X because Apple's server no longer allows it.. or something like that? I'm confused and don't know what to do to fix this phone. I've sent AT&T a request to unlock it for me, if they decide to do so, it will take a week to get that unlocked, and even then I might not be able to update to iOS 6 because of whatever is wrong here. Please help! Thanks in advance
Mike
Mike