Gizmodo
Keeping in line with our previous tips about cancelling Verizon, Sprint, and Cingular, here's the way to get out of T-Mobile without ponying up $200 per line. Yes, it's the same old SMS price-increase scheme, which worked with various success on other providers.
This time, Boy Genius confirms that he cancelled two of his lines using this process, which means that it could work, but YMMV. We're not suggesting you leave T-Mobile, but those of you who still have a year left on your contracts but are anxious for the iPhone may want to plan accordingly.
T-Mobile increasing SMS rates, get out while you still can [BoyGeniusReport via Crunchgear]
