I have a jailbroken iphone 3gs. Just upgraded from 3.1.3 to 5.0.1. When I turn my phone on, it says "no service" at the top. When I open cydia, it says I have SHSH: ios4.1, 5.0.1. I used redsn0w_win_0.9.10b1 to perform the upgrade. I had problems restoring to 5.0.1, so I unchecked the "set hosts to cydia on exit" in tiny umbrella and that took care of the restore issue. After using redsn0w, I went back and checked this box. I am still not getting any service, can anyone help me with this? edit: I went into settings and turned off "enable 3g" and rebooted, still no service. Under settings>general>about, it says not available next to carrier.