12 
Knowing the Keys 
  Press and hold to turn on or off airplane 
mode, silence or ring incoming calls, power 
off, or restart. 
  Press to switch your phone to sleep mode. 
  Press to wake up your phone. 
  Touch to return to the Home Screen from 
any application or screen. 
  Touch and hold to browse and close recently 
used applications. 
Press or hold either end to turn the volume up or 
down. 
Installing the SIM Card, microSD Card, 
and Battery 
Switch off your phone before installing or replacing the battery, 
the microSD card, or the SIM card.   
1.  Remove the back cover.