Previous mobile number

I’ve transferred my previous mobile number to my new Labara account, and it’s working fine. I’ve noticed however that in “Mobile Services” on my iPhone, my telephone number is still shown as the original Labara number. Is this correct? The number looks as if it can be changed but it won’t save. Would appreciate any guidance on what to do or even if it’s necessary to make the change.

I believe that's just a setting you can update on your iPhone JohnW25. If you go to Go to Settings > Phone > My Number you should be able to update the number there.