Default [Q] cm 11 and network data

hey xda, i have a question for those using cm 11 on their t989
i am wondering what preferred network type and apn network type you are using. i am currently using the LTE as my preferred network type and the fast.tmobile APN. since the t989 does not support LTE, would it make a difference if i changed my APN to epc.tmobile and my preferred network type to 3G? (4G isnt an option in the preferred network type)

thanks