I agree T-Mobile has stellar customer service, I contacted them about poor coverage in a new area I moved to. Got a $40 credit on my line, and within a month a network technician had fixed the issue and brought my coverage up.

It's amazing the difference though, I'd call Verizon and would get a generic "We'll send someone to check on it" months later nothing would change. It's nice to be with a company that will actually do something about your problems.