LG E975 Optimus G User Guide

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Volume keys
On the Home screen: Controls ringer volume
During a call: Controls your earpiece volume
When playing a track: Controls volume continuously
TIP! QuickMemo function
Press and hold the Volume Up and Volume Down Keys for one 
second to use the QuickMemo function.
Power/Lock key
SIM card tray
 WARNING
  This part encloses the battery compartment. Please do not open the back 
cover.
  Be careful not to damage the NFC touch point on the phone, which is part 
of the NFC antenna.
Earphone Jack
Flash
Speaker
Charger/USB/MHL port
Microphone
Camera lens
Microphone
NFC touch 
point