Call Blocker has following mechanism for blocker:
* You can have two type for call blocker
1) You are able to add number manually.
2) You can also add from your contact list.
* Here is an effective dialog in Call Blocker which helps you to handling this app easily.
* Call Blocker gives you key by which you can easily unblock the caller.
* Editing name and number also used in Call Blocker.