I got my brother's old 3G after he got the 4S. About a year ago, I jailbroke it for him and unlocked it using the 6.15.00 Baseband. It worked fine until yesterday, when I tried to restore it and put my music on. Now It wont exit recovery mode at all. I tried everything from Custom firmware to downgrading and tinyumbrella. If I use redsn0w, it sticks on the"Installing Activation Bundles" Screen. Is there anyway I can fix this.