Some devices from Apple and Samsung support a calling feature that uses Caller ID (on an incoming call) to verify the call is coming from a verified number.
It is meant to help confirm the phone number is legitimate - and not spam / fraudulent.
Customers on the latest iOS (iPhone8 and newer) or Android that receive a call on VoLTE may notice the verification:
- iPhone includes a checkmark on phone records in the call log.
- Android includes a check mark & "Number Verified" wording on the incoming call.