Can you switch Sprint 2 year contract for T-mobile?

Ok I'm thinking to get the Iphone 5s with the 2 years contract from Sprint company but is it possible to connect the phone for T-mobile? T-mobile don't have the 2 year contract that's why.

Http://wiki.answers.com/Q/Can_you_flash_a_sprint_phone_to_tmobile#slide1

Yes, you can unlock the phone and install a T-Mobile micro SIM card… BUT if you don't keep paying your Sprint monthly fees, your phone will be blacklisted.

You can use your Sprint iPhone with Flash Wireless.

http://superbutilities.shopacnrep.com/wireless/index.aspx