Still testing
Upon installing the app they ask you to make a test call before purchase. The test call is to a toll free number. They put the *67 code in front of the number they want you to call. However this is not a trusting test as you cannot call toll free numbers using *67. It will automatically unblock your number. It appears they forward your calls to a toll free number then back to your phone. Im skeptical based on that test call. Today I received an unknown call did as the app said and when it rang back through it was a GA number that went back to TrapCall. Yet the person calling me was with a local government office.
J Dooly about
TrapCall: Reveal No Caller ID