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06-18-2012, 07:14 PM #13gs 5.1.1 downgraded to 5.13.04 no ATT signal
The tedious history of JB, unlock, flash to ipad base band, etc. is here.
Basically, I have a SIM from an old ATT cell phone that I put into a 2g iphone, and it works just fine as a phone (no data plan). I want to do the same thing with this 3gs. Since JB and unlocking is not working, I suspect there's something else going on since I get a "SIM not allowed" message in settings/general/about/network, but the phone otherwise knows it has a SIM in it, and knows that the carrier is ATT.
Is this something that ATT will solve for me?
Thanks for the help!
08-01-2012, 04:39 PM #2
Idk which SIM you have but i suspect it is lock sim.
08-01-2012, 05:21 PM #3
10-22-2012, 11:59 AM #4
your downgrade failed to apply correctly redo it