Get more control over who calls or text messages you with Ultra Call Blocker Professional. Block annoying or undesired text messages, telemarketers, harassing collection agencies, annoying auto dialing fax machines, or any number or area code that you do not wish to contact you with our advanced blocking filters. Blocking calls and text messages should be quick and easy. Ultra Call Blocker Professional has an intuitive interface and does everything you need more. Don't waste your time on apps.