Instructions
Insert the "Grand Theft Auto 4" game disc into your PS3 and use the controller to begin a game. When the game starts Niko will appear on screen in the third person, meaning you can see his entire body.
Press "Up" on the directional pad on your controller and Niko will remove the cellular phone from his pocket and put it to his ear. A phone keypad will appear in the corner of the screen.
Use the directional pad on the controller to scroll through the options on the on-screen keypad and make or answer phone calls.