This manual introduces the basic functions of the Changhong A399 smartphone, covering safety precautions, device overview, and preparation steps. It explains how to operate the touchscreen, navigate the main screen, and use common features such as calling, messaging, and internet connectivity.
Additional sections detail phone settings (SIM, sound, display, security), application management, battery and charger information, and maintenance procedures. Safety warnings emphasize not using the phone while driving, near fuel, or on aircraft, and provide guidance for handling the device near medical equipment. This manual is written in Chinese.
No, you must stop the vehicle before using the phone.
Yes, the phone must be turned off before boarding an aircraft.