You will need
- Smartphone with Android
In "regular" means one of the Top blocking incoming calls by number yet. Some manufacturers add this feature. So the first thing to try to look for her. Samsung, for example, this function hides the menu Call settings -> Call rejection -> Auto reject list.
If the lock in your smartphone could not be found, then there is a simple and reliable way to remove the sound and vibration when handling unwanted caller. Create room for a new contact and deactivate the ringtone for him.
There are special programs that can help block incoming calls. To find this, go to the Google Play app store. Search for "call blocking". You will be surprised at the number of applications of this kind. For Example, Easy BlackList Lite.
Block unwanted calls and SMS is included in the functions of many mobile antiviruses. So you get a program for blocking calls and antivirus.