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If you input your setting accordingly, the LCD will display the new setting. Otherwise, the LCD will display ‘Input Invalid’; press ESC to return to your previous setting. 5.2.5 Account Settings Press ‘SET/OK’ to the main menu, use ‘UP’ and ‘DOWN’ to select ‘Account Settings. A. Set phone number Press ‘SET/OK’ to the submenu, use ‘UP’ and ‘DOWN’ to select ‘Phone Number’. Press ‘SET/OK’, and then, use 0~9 to input the phone number B. Set user ID Press ‘SET/OK’ to the submenu, use ‘UP’ and ‘DOWN’