Method for unlocking a mobile device, mobile device and application program for using the same

A mobile device, comprising:

• a touch panel screen detecting an external simultaneous multi-touch action;
• a memory unit installed with a predetermined unlock condition, a lock mode, and an unlock mode;
• and
• a control unit, electrically connected to the touch panel screen and the memory unit,
• wherein, when the mobile device is in the lock mode, the control unit determines the if the multi-touch action satisfies the predetermined unlock condition, and the mobile device switches to the unlock mode when the multi-touch action satisfies the predetermined unlock condition.

An application program stored in the mobile device, a method for unlocking a mobile device having a touch panel screen is executed when the application program is loaded and executed in the mobile device, the method for unlocking the mobile device comprising:

• a) displaying a plurality of the touch points on the touch panel screen;
• b) detecting an external simultaneous multi-touch action at the touch panel screen;
• c) determining if the multi-touch action satisfies a predetermined unlock condition;
• and
• d) switching to an unlock mode from a lock mode at the mobile device if the multi-touch action satisfies the predetermined unlock condition, following step c.