So, recently I've been having trouble with my greenpoison iPhone 4 running 4.1. My status bar shows full AT&T signal, and the 3G indicator is on. However, no apps that access the internet can pull down any data. Today I realized that when this is happening, SBSettings shows my Data IP Address to be N/A. Has this happened to anyone else? I thought maybe it was 3G Unrestrictor since I didn't recall having this issue before I purchased that, but I seem to be seeing the same behavior even after uninstallation. I'm not exactly sure what is going on. Wifi works fine. Did I somehow muck up my APN settings? I don't think I know what they're supposed to be to verify that they're right. I do have TetherMe installed, but I had been using that quite a bit a few weeks ago, so it's definitely worked since it was installed.