AT&T, T-Mobile, Verizon, Sprint, MetroPCS, US Cellular, Cricket, and business class C-Spire are currently supported carriers with TrapCall. Conditional Call Forwarding is required in order to unmask blocked calls. If your carrier doesn't offer this feature, TrapCall will be unable to operate with your device.
If you have one of the above carriers and experience issues signing up or activating, please contact our support team via Live Chat. We'd be glad to help!