iPhone SE 2nd generation
What do I need to do to have all my contacts stop showing’No caller ID’. I think I’ve narrowed it ditto possibly a carrier issue involving the *67 function. Xfinity is my carrier and they are clueless.
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Contacts showing No Caller ID may not be a carrier issue.
Where your contacts are stored?
Unlike some Android devices, contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other
If Contacts on iCloud, try this --> Restore contacts, calendars, bookmarks, and more using ...
Else add the email account that stores your contacts.