How to unmask blocked calls with TrapCall (Video) Kevin July 18, 2021 22:50 Updated Follow Learn how to reveal who is behind blocked calls on Android and iPhone devices. Related articles How do I activate my phone with TrapCall? (Video) Does it unblock "No Caller ID" calls too? Why am I receiving an error message when trying to activate? How do I activate TrapCall on my MetroPCS phone? (Video) How can I change the phone number on my account? Comments 0 comments Please sign in to leave a comment.