ios My Number is Wrong So Cannot iMessage/Facetime

[Macintosh]

I recently ported to O2 from Vodafone and have had a few issues but one is persistent - iMessage and Facetime includes only the temporary number O2 allocated to me which is shown in the ios Phone Settings "My Number".  I have tried multiple times to change "My Number" (including after restarts, flight mode, etc.) but it doesn't seem to accept it - it immediately reverts back to the temporary number.  This means I cannot use iMessage with anyone who has my number.

Any advice would be very  helpful!

Thank you

[madasaf1sh]

@Macintosh 

You are best speaking to apple direct, as they can help in changing the number, https://support.apple.com/en-gb/ 

[MI5]

@Macintosh 

You can ask O2 for a new blank sim and do a sim swap to activate it with your number so the phone isn;t reading the wrong number from the sim.

Guide: Sim Swap: a mini guide 2017 update 

[Macintosh]

Thank you - I guess it could be reading the temporary number from the SIM - I'll ask O2 and see if they will do this.

Thanks

[Macintosh]

Someone else suggested removing the SIM tray (while the phone is switched on) for a few seconds and then turning off imessage and facetime and then turning them back on again - I tried this and the temporary number still came up. However, I then clicked on the temporary number and it asked if I wanted to remove it so I clicked yes and then my correct number appeared.

Thanks for everyone's help