Systems and methods of providing seamless and secure operations of authenticating and advertising on mobile communication terminals

A mobile communication terminal comprising:

• a display unit which is turned off in an off state and turned on in an on state;
• and
• an input unit to which receives a user input from a user;
• wherein, when said input unit receives a first user input in said off state, said terminal runs a first authentication operation in response thereto,
• wherein, when said user fails said first authentication operation, said terminal switches to a lock state and displays on said display unit an advertisement screen which includes at least one advertisement thereon, and
• wherein, when said user passes said first authentication operation, said terminal switches to an unlock state and displays a home screen on said display unit.

A method of providing an advertisement to a user of a mobile communication terminal, wherein said terminal includes a display unit which is turned off in an off state but which is turned on in an on state, said method comprising the steps of:

• receiving a first user input in said off state;
• turning on said display unit and displaying a default screen on said display unit in response to said first user input, without requiring any additional user input;
• running a first authentication operation in response to said first user input, without requiring said additional user input;
• switching to a lock state and displaying an advertisement screen on said display unit when said user fails said first authentication operation;
• and
• switching to an unlock state and displaying a home screen on said display unit when said user passes said first authentication operation.