We unmask Blocked, Restricted, and Private calls you receive. Unknown calls and VoIP numbers can't be unmasked, but with Privacy Lock, these calls can't get through unless you let them. When this feature is enabled, unknown callers you reject are asked to record their name before the call is connected. When the call rings back to you, we'll play their recorded name and give you the chance to accept, hang up, or send the call to voicemail. This feature is available with a Premium or Ultimate subscription.