Application to protect the customer base?

Question

Android

Hello.
Interested in an application to protect the customer base from being drained by managers, I would like something like a dialer associated with the admin panel, for example, manager Vasya can call Ivan Invanych. He calls from the dialer, but he does not see the number, statistics, the client, etc., get into the dialer from the admin panel.
Something like that, sorry if it's confusing.

Answer 1

Does he call on the Internet or through a SIM card? If through a SIM card, then on iOS it is not possible, the rest is all feasible