Abstract: A method for offering services according to facial expressions is provided. The method has an electronic device storing a service database recording at least one user's information. The method activates an offering service function; captures facial expressions of the user; extracting the features of the facial expressions; compares the extracted features with the features in images of the facial expressions stored in the service database, so as to identify a corresponding feature stored in the service database, and determines the type of expression and the service corresponding thereto from images of the user stored in the service database; and activates and provides the determined service. An electronic device using the method is also provided.

Abstract: A method for unlocking a locked operating system of an electronic device is provided. The electronic device includes a storage unit and a locking unit, the storage unit is configured for storing a preset password and preset unlocking request information. The method includes steps: receiving a message from a second electronic device; verifying the received message according to the preset unlocking request information; and sending the preset password to the second electronic device if the verification is successful.

Abstract: A method for offering services according to facial expressions is provided. The method has an electronic device storing a service database recording at least one user's information. The method activates an offering service function; captures facial expressions of the user; extracting the features of the facial expressions; compares the extracted features with the features in images of the facial expressions stored in the service database, so as to identify a corresponding feature stored in the service database, and determines the type of expression and the service corresponding thereto from images of the user stored in the service database; and activates and provides the determined service. An electronic device using the method is also provided.

Abstract: A method for unlocking a locked operating system of an electronic device is provided. The electronic device includes a storage unit and a locking unit, the storage unit is configured for storing a preset password and preset unlocking request information. The method includes steps: receiving a message from a second electronic device; verifying the received message according to the preset unlocking request information; and sending the preset password to the second electronic device if the verification is successful.

Abstract: An exemplary electronic device used for a synchronous control system includes an input unit, a communication unit, a storage unit, and a control module. The input unit includes at least one key including a unique key code. The storage unit stores a code table recording key codes of each of the at least one key. The control module executes the function associated with a key or a key combination manipulated by a user, and determines the key code associated with the key or the key combination. The control module further transmits the determined key codes to other electronic devices to control the other electronic devices to also execute the same instruction as the corresponding instruction associated with the determined key code associated with the key or the combination. A related method is also provided.