Call Blocker-block number is one of the most effective apps to prevent unwanted calls or texts. Calls Blacklist is both a call blocker . It can easily block calls from unwanted, private (hidden, anonymous) or unknown numbers. If you are tired of annoying calls. spam and robocalls, then Calls Blacklist is your solution. It is very easy and lightweight, yet powerful call blocker. how to block calls Select menu black list and press the red button and select the number you want to block. **Featured: - Block calls using blacklist. - Block unknown numbers. - blacklist number. - Block private/hidden numbers. - Block a range of numbers using the Begins with option. - Block all numbers. - Use Whitelist to prevent block of certain people. - call blocker - auto block unwanted calls. - nuisance call blocker, spam call blocker. - block phone number, block caller id. - call blacklist. - caller id and block . - call blocker app. - Icon in the status bar can be turned off. - Save/load blacklist. - Turn on/off blacklist.