Text message reply going to a different number

[Lms123]

Hi, my son has just bought a new first phone (new first numbr) I can call him and whatsapp him ok but if I text him it goes to a different number, but is displayed on the same string of text messages as if he has received the text. My partner has no problems with text from his phone

[MI5]

@Lms123 

Check the number your phone has saved for messages.

If an iPhone, Settings >Phone >My Number

If Android, open message app >Settings >General >Phone Number

[Lms123]

Hi, sorry I am not very technically aware. I have an android. If i go into the settings there is no general, am i in the wrong place?

[MI5]

@Lms123 

You need to look in the settings for the message app.

Open message app then tap the 3 dots top right.

[Lms123]

Ok, then press settings

[Lms123]

Then there is no general, I have a samsung a21s if that helps

[MI5]

@Lms123 

What choices have you got in settings?

Is there "advanced" or "sim" ?

[Lms123]

Chat setting,

Conversation categories (ticked)

Notifications

Block numbers and messages

More settings

Emergency alert history

About settings

In more settings i have-

Text messages

Multimedia messages

Quick response

Push message

Broadcast channels

Remove location from shared images

Delete old messages

[MI5]

@Lms123 

Unfortunately I don't have a Samsung on hand to check, but somewhere in text messages or chat settings there will be a phone number.

This needs to be your number.

[Lms123 · Accepted solution]

Thank you for your help. I managed to find a phone number for O2 technical support and they have just changed the number. Hopefully this will sort the problem. Thanks again