User guide

14 2A. Device Basics
Back View
䢇 Speaker lets you hear the different ringers and
sounds. You can mute the ringer when receiving
incoming calls by pressing the volume button. The
speaker also lets you hear the caller’s voice in
speakerphone mode.
䢇 Camera Lens lets you take pictures and videos.
䢇 3.5 mm Headset Jack lets you plug in an optional
headset for convenient, hands-free conversations.
䢇 Microphones capture audio during recording, phone
calls, and video chat.
䢇 Flash helps illuminate subjects in low-light
environments when capturing a photo or video.
䢇 USB Charger/Accessory Jack lets you connect the
phone charger or a USB cable (included).
WARNING: Inserting an accessory into the incorrect
jack may damage the device
.
WARNING: Inserting an accessory into the incorrect
jack may damage the device.
BST_m840_UG_.book Page 14 Monday, May 13, 2013 1:29 PM