I had T-Mobile when I was like 13 (yeah, I was one of those young kids with a cell phone, but it was a basic camera phone), so I'm not sure about their CS, but I never had a bad problem with them service-wise. Not sure why there's so many complaints.T-Mobile.
Their customer service is so nice.
Oh yes, the M2M is one thing... and then factor in those delicious Rollover minutes. More reason to keep AT&T.Kind of why I would be choosing AT&T. It service is the best were I spend my time. Plus most of my friends and family are on it so the free M2M keeps me locked in.