“CallBlock Pro” is the latest app. to block unwanted calls. It provides user with the functionality of restricting "Incoming Calls" and "Outgoing Calls" on the phone. It also blocks Incoming Messages from unwanted numbers. The application works in two different modes: Black List and White List. The numbers which are on Black List are blocked and those on White List are allowed depending upon the selection. By using the Group Functionality the application can block the Calls and SMS of all the selected group members. The Application also maintains the log of the blocked calls and messages. A Notification message can be set and the same message will be send to the blocked user.