Understanding Your Device 2311. Light Sensor lets you use the ambient light level to adjustthe screen brightness/contrast. This sensor decreasesscreen brightness in dim light.• In a bright light condition (outdoors), the sensors cause the deviceto increase the brightness and contrast for better viewing.• In dim light conditions, the device increases the screen brightnessto compensate.12. Volume key allows you to adjust the ringer volume instandby mode (with the phone open) or adjust the voicevolume during a call. When receiving an incoming call:• Pressing the volume key down mutes the ring tone.13. microSD Card Slot (internal) allows you use a microSD cardto expand the memory of your phone.14. Power/End key ends a call or switches the phone off andon. Press and hold for two seconds to turn off Silent mode,Airplane mode, or to turn the phone on or off.15. Headset jack allows you to connect a hands-free headsetso you can listen to music.Back View of Your PhoneThe following illustration shows the external elements of yourphone:1. Flash is used to take photos in low-light conditions.2. Camera lens is used to take photos.3. External speaker allows you to hear ringers, music, andother sounds offered by your phone.12 3