I have a Verizon iPhone 4 running iOS 4.2.10 on a tethered jailbreak. I'm trying to take my iPhone to Apple because my home button is not working and a red spot on the screen (guess a pixel is out), but i need to undo my jailbreak first. I tried updating and restoring to iOS 5.0.1, but i keep getting an error message, "This device isn't eligible for the requested build." I read forums it could be my host file, but i've tried following the posts. I also deleted TinyUmbrella thinking that could be the cause, but had no success. This is the last two lines of my "host" file: # 18.104.22.168 gs.apple.com # 127.0.0.1 gs.apple.com I don't know what else to do.. Does anyone have any idea as to what I can try next?