How to lock phone number so it can't be ported out?

[Ms30]

The Subject line says it all.

[DaveO3]

If you have an iPhone:

https://support.apple.com/en-gb/HT201529

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. 

[Ms30]

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 🙂

[DaveO3]

Dial 611

[HausOfThunder]

Good luck with that. I have been a victim of the SIM Swap attack with another carrier so when I came to XM, they have no idea what I was talking about. Hopefully you have been able to get this taken care of. If you have, will you update your post so I can know if I should call them back and try to put that lock on my number?