Question [Q] Sprint galaxy s4 with cyanogenmod 11 on T-mobile network

I Know this is possible but the question to me is how. I have the SPH-l720 and it is unlocked running cyanogenmod 11 and I want to use Tmobile. When I put the sim in it doesnt not register it and when trying to change the network preferences I have no options. Is there a way i could just take the apn setting from the T-mobile rom or anything that will let me connect to the network. Thank you ahead of time