I work in the basement of a large building about 20 ft under ground. I have never had service at my desk in the basement. It always reads "No Service". I loaded 4.2 GM on my iPhone4 Friday night and got up and went to work on Saturday morning. I texted a friend just before I went into the basement to confirm a meet time later in the day. Not really expecting to get a text back. I get downstairs in my bunker and set my phone on my charger and start working. All of the sudden I am getting texts from that friend and I can send texts! I actually have 1 bar of Edge now at my desk. The only thing that has changed on my phone is 4.2 GM. Anyone else notice this?