Hey new guy here. Been lookn around the inter web for days lookn for answers but no luck. I bought a 3GS flashed to straight talk with minutes on it. It had iOS 4.5 I think? Already jailbroken. Was perfect. call txt etc worked.So upgraded to 6.13 and jb again untethered. Everything worked fine for almost a week than a few days ago (yeaterday) it said no signal. I restored to non jb and 613. Still no luck. I rebooted. I took sim out. So what can I do? I hate payn for minutes and can't use it. Heh ty