Hi there, I was foolish enough to update my 3GS with baseband 6.15 to iOS 5 because for some reason the jailbreak for 4.1.2 just messed badly with my reception so I thought going to iOS5 might fix it. Anyways I upgraded it through redsnow and restored it in iTunes with the NO_BB_iPhone2,1_5.0_9A334_Restore.ipsw but now when I turn on the phone there comes an activation screen. I go through the set up, selected disable location services, but then it tells me that my SIM card is not valid and I just can't get past that stage. Did I upgrade it incorrectly and is there any way past that screen so I can at least use my iPhone as a iPod? Any help is really appreciated!