Text replies appearing from a different number

[Yvonne2]

Hi.  I sent my daughter a text today to her usual number.  She replied a few minutes later but the number was a completely different number!  I called her on her usual number and she answered but when she sent me a text again it came from the different number.  Very confused! Can anyone help please? Thank you.

[madasaf1sh · Accepted solution]

@Yvonne2 

Your daughter needs to update the number in the handset settings, as she has probably ported the number across to a new network.  And the phone hasn't been updated from the temporary number.

[MI5]

@Yvonne2 

If it's an iPhone you need to go to Settings >Phone >My Number

If an Android it's under advanced message settings >RCS in the message app.

[Newphone123]

I’ve tried doing this with my phone as same issue and it won’t save… just keeps going back to SIM phone number though my old phone number has transferred across. 

[MI5]

@Newphone123 

Get a new blank sim from O2 and do a sim swap Guide: Sim Swap: a mini guide 2017 update 

You will then be able to save your number to the phone.