Unknown caller android

I am developing applicaton that listens for different user calls. One of possibilites is that unknown caller will call me (without number/ restricted number). I would like to st开发者_JS百科udy this case, how I can simulate such call in DDMS enviroment?

In the DDMS view, Emulator Control, at Telephony Action you can enter a specific number, or to simulate unknown caller try leaving the field blank. EDIT: place # in the Incoming number field.