Speaking of 900mhz... if I use AT&T, and my phone doesn't have 850, but is triband, will I be able to use it in major metropolitan areas at least? I have a big phone that does quad band, but I don't like having to leave it in my car when I go to a club. I'd rather have something like the aforementioned birth control pill box to clip on my jeans or something.
If I can get Ok coverage without 850mhz, that opens up my options a lot as far as small phones go.