Earlier in the week, Consumer Reports ranked AT&T as the worst carrier in the nation, citing poor scores in overall service and customer support.  I have personal accounts with all four nationwide carriers, and I've traveled extensively with all of them.  Like the other three, there are places where AT&T works well and places where they don't.  Las Vegas during CES, where 100,000+ tech nerds are carrying iPhone 4s?  Forget about it.  AT&T in the Charlotte metro area?  Works great for me.

I turn it over to you.  Which carrier is the worst in your neck of the woods?  Cast your vote, and tell me why in the comments!