If you have an iPhone:
Read carefully to determine whether you really want to have the hassle of using a SIM PIN. If so, make sure that you have the card that you received when you received your SIM.
Thank you. I guess the subject didn't say it all. I meant how to get my comcast mobile number locked (by comcast) so it can't be ported out. I had it locked with verizon wireless before I switched last week to comcast. Thanks again 🙂