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Best Call Blocker

Do you hate it that even after installing a call blocker, you still get spam calls from unrecognized numbers? If you do, try SENTRY.

SENTRY works like a real sentry guarding your house phone. It recognizes the friendly numbers (White List) and let them in, it recognizes spammers (Black List) and hangs up on them. For unrecognized callers, it will perform 'Stop and Check’ which will let in the ‘good’ callers and drive away the ‘bad’ callers. This unique Active Blocking will block 100% robo junk calls and 99.9% of telemarketer/solicitor calls. All you need to do is to set up a White List, that includes your friends and family members, doctor offices, pharmacies, etc. Once you have the White List set up, SENTRY is fully automatic. There is no need to hit REJECT button anymore. You will no longer be bothered by those annoying telemarketer calls, not even one. And you don't need to do a thing! There is no need to hit REJECT button like most other call blockers. Worried about missing important first time calls? SENTRY allows first time callers to press 0 and ring the unit so you can pick up the call. By pressing 0 the caller's number is automatically saved to the White List.

If you are not ready for the Active Blocking, SENTRY can be used as a conventional call blocker with Black List. You can choose to have SENTRY to block based on Black List only. SENTRY has a Black List capacity of 1500.

Please watch SENTRY intro video for more details.

Why is SENTRY so effective?
SENTRY 2: Preload White List
SENTRY 2: New and Improved

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