My iPhone 4 is working perfectly in every way except one...
In and around my apartment, I cannot access the internet. I can still receive phone calls and texts, but I can't get online at all.
At first, I thought it was just a network issue related to AT&T, and didn't think much of it. But its been happening for about a week now. Last night, a couple of my friends came over, and they both also have iPhone 4's. Turns out they can fully access the internet at my house, with no problems.
Rebooting my phone fixes the issue for about 2-3 minutes, then I can no longer access the internet.
When I leave my house, no matter where else I am, once I get outside that 1/2 mile bubble, everything works perfectly.