Messages sent to a specific contact are being delivered to their old phone number
Messages sent to a specific contact are being delivered to their old phone number
iPhone 15 Pro, iOS 18
Question marked as
Re: Messages sent to a specific contact are being delivered to their old phone number
You might want to check:
whether the phone number you have listed for that contact in the Contacts app is correct.
If needed you can: Edit contacts on iPhone
Apple Suppoert's article:Edit contacts on iPhone - Apple Support
Eg: says:
- Go to the Contacts app
on your iPhone. - Tap a contact, then tap Edit.
- Enter or update the contact’s information.
- When you’re finished, tap Done.
when you call or text a contact, iPhone uses the same line you used for your previous communication with this contact by default. To choose a preferred line for phone calls and SMS/MMS message conversations, select
the contact, tap default (below the contact’s name), then choose a line.
To change how your contacts are sorted and displayed, go to Settings 
> Apps > Contacts."