It's happened again, I upgraded/Jailbroke my iPhone now its on 5.1.1 and I have the "No Service" issue. I've done so many combinations of resetting network settings, rebooting, toggling roaming/data and nothing. I contacted Sprint and they couldn't do anything but give me a ticket number. When I did upgrade it from new it had "Extended" (which it didn't have for a while) then went to No Service shortly. Nothing has worked and I don't want to spend the hours restoring and putting everything on my phone only to have that not fix it. I'm out of ideas. Advice?