I did a quick search and didnt see anything on this topic. I just picked up my Thunderbolt yesterday and am really loving it so far. I have noticed one thing with it though, while sitting here at my desk, if I cradle the phone in my hand I get a much lower signal strength than I do if I set the phone down on the desk. About a 10-15dBm difference when looking at the signal strenth info on the phone. Are there any known issues with hands blocking the signal?? If I move my hand locations around it seems to change the signal strength too. FYI, I have the extended battery if that makes any difference. Thanks!