Sony Ericsson P800 is a tri-band mobile phone suitable for global roaming. This handset combines a phone with PDA functionality, and one important design feature is that the phone’s alphanumeric keypad is on a Flip section, which can be used in either an open or closed position. When the Flip is closed the keypad is available for use, but it partially covers the screen to give a reduced size display, and when the Flip is opened this exposes the whole screen and offers many more functions to the user. A further option is that the Flip section can be completely