Is there a tower down in Dearborn, Michigan? How do I report it?

My reception has dropped significantly in the Dearborn, Michigan area (Michigan Ave + Schaefer Rd). A good part of the time it says "International (Roaming)" but I'm 5 miles from Detroit River (which is the boarder to Canada) and I've never seen "international" before. At those times I can't even get a signal if I force it to not roam.

I've had Sprint at this location for 7+ years and the same phone for months (and a different handset of the same phone Treo 755p for a year or two).

I just did a few tests driving around and you can see the difference by just heading a mile west. As a test, I streamed some audio and it dropped a half-dozen times as I was driving away from my house. Worked fine for a 1/2 hour and as a approached my house it started dropping again.



Maybe it's the phone, but since I'm picking up Canada, I'm going to say it's a tower around here.

So where do I go to complain?

Thank you,
Gary

If it's the phone, it might be time for an upgrade. The Palm Pre should come out this week (Friday?) and the new iPhone next week (Tuesday?).