Number in Iphone not able to change after porting

[Nbradley1974]

I'm trying to change my number in my iPhone after porting my old number to Three. However it will not let me save it and has the original sim number saved. 

I have turned off imessage and facetime and re-started many times.  I have even tried putting sim in old phone and the correct number shows up in that one, and changed and saved it, but as soon as I put it in the new phone it reverts back to the mobile number that the SIM came with. 

Can anyone help me on what I need to do to get this changed.

[MZone]

Go into your Apple ID and delete the old number. 

[Nbradley1974]

I've deleted the old number already. But in settings - phone - the old number is still showing and when I change it and press save it doesn't save.

[Nbradley1974]

It's also sa bying that the number i have ported must have a SIM associated to be used for message and facetime

[PeteG · Accepted solution]

Hello. 

I'm not sure if it's the same issue you're having, but another user mentioned something similar, and a solution was posted that resolved his issue. It might be worth checking that out. 

https://community.three.co.uk/t5/Network/Split-CLI-on-Porting-number/m-p/33427#M6906

Pete.

[Nbradley1974]

The network re-set worked - thank you for your help.

[yorkshire3bee]

https://community.three.co.uk/t5/Network/Split-CLI-on-Porting-number/m-p/33427#M6906

Perfect - the solution here works - do exactly what it says! Thanks PeteG

[MZone]

Switch off iMessage and FaceTime. Goto the number and change remembering to put it in the format +44 7*** ****** then press save. It should hold. Then you can toggle iMessage and FaceTime on again. 

[Nbradley1974]

I have already tried this as a fix but didn't work either.  The reset network option seems to have work as suggested above.  Thank you for your help

[Liz3]

Does this reset option delete everything on your phone? I’m having the same problem and nothing has worked but sceptical to reset as I don’t want my phone to be wiped. Thank you!