From Vlad Lee:
This app can block numbers to prevent unwanted calls and messages. You can add any number to the blacklist or enable one of blocking options: "Private numbers", "Unknown numbers" or "All calls". Also you can block numbers by prefix. This app is easy to use, lightweight and provides wide range of functions. Features: Blacklist (list of numbers, you want to block). Schedule. Whitelist (never block list). Journal of blocked calls and messages. One click ON/OFF call blocker or SMS blocker. Blocking of unknown and private numbers. Blocking by prefix ("Begins with" option). Blacklist saving and loading. Advantages: Robust call blocker. Works on all devices. Easy to use. Lightweight. And it's totally FREE.