What should I do if the caller ID of OPPO A59 mobile phone is unknown?

The attribution of 1 number has not been updated, so you can enter the dial menu to set the push-to-talk settings.

2. Some new mobile phone number segments have not been updated to the number attribution, and cannot be displayed. You can try to update the number properties later.

3. Some numbers are blocked, so they can't be displayed. Such telephone numbers are rare.