Do you monitor call activity?

And do you show information which is call-related?

In this case your information should be displayed on this specific phone app where you got the call-information from.

Example:

Phone-App-One tells you that there is a call with remote party "abc". You gather information about remote party "abc" and you want to display that information in Phone-App-One only, because there is the call.

When you send the "CallInfo" message DO NOT send it to "*".

Send it to that API provider where you got the call information from.

/Thomas