Samsung M520 Owner's Manual page 41

Exterior Phone Features
1. Volume Key
2. Power/Accessory
Interface Connector
1.
Volume Key allows you to adjust the ringer volume in standby mode
(with the phone open) or adjust the voice volume during a call. The
volume key can also be used to scroll up or down to navigate
through the different menu options. To mute the ringer during an
incoming call, press the volume key up or down.
2.
Power/Accessory Interface Connector allows you to connect a
power cable and optional accessories such as a USB cable or a
hands-free Bluetooth headset for convenient, hands-free
conversations.
3.
Status Light blinks to indicate an incoming call. This feature must
first be enabled via the Settings > Display > Status Light menu.
6. Camera
5. Camera Key
4. microSD Card
3. Status Light
Section 2A: Phone Basics
Slot
15