For a while I was running stock gingerbread rooted with revolutionary. Then I saw the ICS OTA pop up on my phone. I did a little bit of research and ended up here. In that thread I read : "if youre just tired of being rooted,flash the gingerbread ruu to get back to unrooted firmware and factory recovery. leaving the revolutionary s-off bootloader in place is the safest,and best option,and will not affect your ability to recieve OTAs. AGAIN- if youre just following this procedure because youre tired of being rooted,skip this next section and leave the permanent hboot in place. jump to "Putting current stock firmware and s-on back onto the phone" and flash only the first "PG05IMG_no_hboot_2.11.605.9" file(you can flash the 2nd file too if you want,but the permanent hboot will block i) " so I did. Downloaded the first file, renamed it and flashed it. Everything went fine I I even got the ICS OTA at first boot. But after downloading the entire thing I get an error and it doesn't work. Now if I check for updates it finds the ICS one but gives me a "Server Unavailable" error. Can anybody tell me what I did wrong?