Abstract: Based on Symbian operating system,the user interface of voice dialing software on smart-phone is implemented in VC++ 6.0 compiler environment.Through the software compiling and simulation with a simulator,the validity of the software design is tested.At last,when the software is down loaded to the mobile phone platform through Bluetooth and infrared format,the feasibility of the project is validated.

Key words: smart-phone；user interface, operating system