Having drawn the mobile phone in pencil use a fine line felt pen to add colour to the outline. In this example a fine red pen is used to outline the basic shape of the phone and a fine grey pen is used to outline the screen and the buttons

Broad felt pens are then used to shade / colour the phone. A broad red felt pen for the main area and a broad grey felt pen for the buttons.

Using coloured card, manufacture a screen view. This could display some of the functions of the phone such as;

SEARCH, TEXT, EMAIL, PICTURES, INTERNET AND MUSIC.

Glue the card in position to complete the presentation.