I've done a forum search on this and nothing jumped out. I live in Concord, California (San Francisco East Bay). My iPhone 4S cell reception has always been weak (1 - 3 bars 4G). After upgrading to iOS 6 (full install via iTunes then restore from backup) my reception is even worse. I frequently get 'No Service' or one bar around the house and on my street. I talked to an AT&T rep A YEAR AGO and he showed me that they were upgrading towers in my area this year. Meh. Anything I can do to my phone to try to improve reception, or shall I just go and complain to AT&T? I have 4 smartphones under contract with AT&T so I can't just jump ship to Verizon.