Caller id didn’t work

If you mean you see number but not name from your contacts then try this whether your contacts are in iCloud or in your chosen email account

(You might want to back up the phone first, and if your contacts are phone only you have no remedy)

Close Messages app. then for

Contacts in iCloud:

Settings, Your name, iCloud, Turn off contacts

Contacts in another email account:

Settings, Contacts, Accounts

Find the account with Contacts turned on. Turn contacts off

When asked if you want to keep them, choose “delete from my iphone ”

Open Contacts app and it should be empty.

Power the phone off and back on.

Then

Contacts in iCloud:

Settings, Your name, iCloud, Contacts. Turn it On

Contacts in another email account:

Settings, Contacts, Accounts

Find the account with the Contacts again. Turn contacts On

Open Contacts app and it should be re-populated.

Then try again.

Try changing them (start with one or two) into international format

ie +44 7891234567

instead of

07891 234567

Only by hand. There may be an app to do that. I once tried exporting to .CSV and edit/replace in Excel but it removed all the leading zeros and messed them all up.

By the way I had to do this to my contacts in the last 6 months when something changed iniOS.

My daughter's contacts are in the local format and she has no problems. I can't explain why.

You're welcome, good luck.