Calls annoy some subscribers. Turning off the phone does not give the desired result. However, there is a solution. You can block annoying calls subscriber. Other people can easily reach you.
This application uses the internal capabilities of the operating system Android. Therefore, once the caller will hear the busy tone.
Easy work with contacts phonebook. Work in recent versions of the OS Android.
After pressing the button "Contact List" displays a list of contacts. Setting the checkmark contact will block the call from the person. If you remove the checkmark, the calls from the person will be available. You can also use the quick filters "White List" and the "Black List".
Available for selection on the characters entering the contact's name.