Business isnt exactly booming for them over there, while other networks continue to make a profit, shows some reflection of the service they offer. I've never heard a good word about T-Mobile USA, everyone complains about the poor service and value for money.
It doesn't help that compared to the EU, American and Canadian networks suck hugely in comparison. Every thing there is an extra. Pay for texts or pay for calls, or pay for data, pay for MMS. You even pay to receive text messages from overseas. You're call tariff charges are high too.
I'm with T-Mobile UK, for £43 a month, I get £225 of calls, texts, mms, I never break £100. I get unlimited data free. Im not charged anything extra on top of my £43 for international calls and texts, and I don't pay to receive calls and messages from overseas either.
Its suprising to see how behind the times it is in North America when it comes to Mobile networks. I noticed the same thing applies to your Internet services aswell.