Function:   Turn off and lock the screen for your beloved handset.   This function already exists on your phone, which is the power button. But because of too much pressure it will quickly become greasy and gradually damage the power button. So we write this application helps the user to share the burden on the power button (Power). Launch icon: After installation, the application will have 2 launch icons: 1. "Screen Off and Lock" is used to perform the function of turning off and locking