I've updated to 3.1.2 using the pawnage tool to save baseband, however the AT&T logo is messed up. I see the 3G icon and the bar. The AT&T logo is missing. I've tried to install the benm carrier file and the AT&T logo is back, however when I insert Tmobile chip, It still shows AT&T and when calling customer support, It connects to tmobile. So it seems the carrier file displays AT&T regardless. This was not the case when I was on 3.0. Can someone help?