Okay...I've had my 3GS now since the day it came out. I didn't pay much attention to it at the time, but for the last 6 or 8 months I've been having serious signal strength issues. When I'm at home or at work, the signal is very week...I either get one or two bars in either location. A co-worker has the same phone and we both have our phones jailbroken, with a case, and we're both on at&t. He get's perfect signal on his 3GS where I get 1 to 2 bars on my 3GS in the same office sitting at the same desk. Why would one 3GS have week signal when the other has full signal? Both of us also have 3G turned off to save battery life. If I'm away from home or work...like if I'm in the car or a restaurant or store, the signal is perfect.