My iPhone 4 running on 4.2.1 and I was wondering if I could restore the phone? My iPhone 4 running on 4.2.1 and I was wondering if I could restore the phone to the same firmware by dowloading the original firmware and holding SHIFT in iTunes and clicking restore???
You may restore your iPhone to 4.2.1, but you need the SHSHs for your device as Apple servers only allow 4.3 firmware at the moment, I think.