i am trying to figure out how to update the firmware from 5.0 to 51.1 with a baseband that has already been downgraded. i am able to restore the phone but not upgrade...anything? Thanks
your boned. you need to be on 5.1.1 already, or have 5.1.1 blobs saved. which im assuming you dont have have.
unless.... if ios 6 cant be on the 3gs then you just need to download the 5.1.1 and use redsnow to stitch it together with your custom baseband