Reason I pay out the nose for Big Red - is coverage/ coverage/ reliability.
I do love what T-Mo is doing with opening up the handsets and trying to get business though in most cases you're better off selling your own handset - and buying a T-Mo compatible handset and avoiding a contract with T-Mo.
I had experience in changing to T-Mo - I did not survive a week.
I had dropped calls, I had low signal. In lower Wisconsin I had no coverage.
So I bit the bullet ponied up the cash and headed back over to the Big Red where my only bitching is the bill