I jailbroke my 3GS (the newer bootrom model) running 3.1.3 via Spirit. Then I installed ultrasn0w 1.2. And did a hard reboot. I'm wondering if the unlock worked. I unfortunately don't have a tmobile SIM to try out. But what's worrying me is that I don't now see a new "Carriers" section in my settings. Does that mean it failed?