Not work. At all.

Selected Contacts only. Foreground or background appearance. Wrote in the listing/database of the app direct phone number to test. The number is not in Contacts obliviously.

Called from that phone. Call is permitted. Nothing happen from the program.

Contacts app from Android installed. It has 2 other phones.

Installed Google Contacts. All is the same.

Samsung S21 Android 14 All updated upto 2025 01 01