Hope this isnt true......or maybe so it answers our questions about poor 3g

[psywzrd]

I live in Dallas, where I am supposed to have full coverage. My iPhone always says "No Service." My mom's Samsung has full bars of 3G in my house, but I have nothing. Occasionally I will get a bar.

When I don't get 3G, it's supposed to default to Edge, right? How long do I have to wait for it to do that? I always have to manually turn 3G off to get to Edge.

If your mom is also on AT&T and she is getting full bars of 3G while you're getting none in the exact same location, something is seriously wrong with your phone. You need to take it back and get a new one.