Wrong number showing on Sent text messages

[Nufkamp]

I set up my new phone yesterday and ported my old number across. If I send a text it shows it as coming from the number on the sim prior to my number porting across. I can receive texts to my ported number, and calls correctly show my ported number, it's just text messages that show the wrong number. Any advice?

[Cleoriff]

@Nufkamp 

When porting across, text numbers are usually the last thing to work properly. Keep rebooting your phone.

[Nufkamp]

Ok, thank you. I will give this a try for a few days.

[MI5]

@Nufkamp 

Settings >Phone >My number.

Change it to your number, save it and reboot phone. 

[Nufkamp]

There is nothing under the settings where I can do this, neither in Message settings or the About Phone setting.

[MI5]

@Nufkamp 

What phone have you got?

[Nufkamp]

Samsung S21

[MI5]

Should be in message settings either under general or SIM or advanced RCS settings.

[Nufkamp]

I have found the (a?) solution, certainly the correct number is now being shown to the recipient. I went to Settings >Chat Settings and changed Default Messaging Type from Chat to Text or Multimedia.

[MI5]

It's the chat setting that uses the number stored on your phone.