Sprint and T-Mobile use incompatible technologies, CDMA w/ Sprint and GSM on T-mobile. Nothing you can do to make it compatible on T-mobile. Sorry about that.
I have a PC 6700 phone that was on Sprint service. I am now on T-Mobile, and I would like to use the PC 6700 on the T-Mobile service. Can anyone tell me how to unlock this phone or am I stuck having to get a similar phone from T-Mobile.