Change "My Number"?

[Cheetah Designs]

I ported my number in from another network but it hasn't changed the number under Settings -> Phone -> My number.

How do I change this number to what it should be as it is used for iMessenger?

Thanks.

 

[Cheetah Designs]

Sometimes it is "locked down" and greyed out. Must be carrier-specific.

It's locked for me (greyed)

 

[Cheetah Designs]

I read something recently on this that fixed mine, but unfortunately I can't find the link.

Try switching FaceTime off, iMessage off, then both back on - that rings a bell, but probably not the entire process.

Cheers. Sorted.