Ugh. This might finally get me to leave T-mobile. I left ATT after a horrible experience and vowed to never go back. I am not happy.
The nice thing about T-mobile is it is/was the only company which charges less if you didn't have a contract.
See article seven of the CTIA's Consumer Code for Wireless Service (http://files.ctia.org/pdf/The_Code.pdf):
"Carriers will not modify the material terms of their subscribers’ contracts in a manner that is materially adverse to subscribers without ... allowing subscribers a time period of not less than 14 days to cancel their contracts with no early termination fee."