I got my iPhone 4S 16GB a few weeks back and I have had some weird problem with my 3G connection. My 3G connection can suddenly disappear (I still have full bars) and If I try to browse safari or use any other app that require an internet connection, "can`t connect to network" pops up. A simple Respring doesn`t fix this. I have to reboot it to get it working again, then it will work flawlessly for maybe 1 hour or so, until it disappears again. This is really annoying and I really hope some of you on this forum would be so kind to help me with this issue. Btw, I live in a big city so reception isn`t the problem here.