1. To answer an incoming call or send a call, press the Send key.
   
2. To reject an incoming call or disconnect from a call in progress, press the End key.
   
3. To return to the previous screen, press the Back key.
   
4. To lock or unlock the screen, press the Lock key.
   
5. To adjust the volume, press the Volume keys.
   
6. The MicroUSB port is located on the side of the device.