I upgraded recently to 1.1.2 and i have had at&t. So no problem well i just got tmobile and downgraded to 1.1.1 and installed oktoprep. Then installed anysim the new one for the new modem firmware. It like worked but when i put the sim in it didnt work, Yet it had the red circle by the phone on the top right of the corner. I think i might need to virginize and do it all over not sure any help on how i virginize or if i even need to?

Can i downgrade my modem firmware?
I am pretty good with downgradeing and installing, and jailbreaking.

Please help thanks so much..