Before you begin, make sure:

• The speaker is paired with your mobile phone.
• If you want to use the Smart Sensor to end a call or receive a call, make sure the Smart Sensor is switched on. If not, press the button (indicated on the diagram) twice to switch it on. 
  Tip: check whether the Smart Sensor is switched on by swiping over it. It is on if there is an audio feedback when you swipe over it.
  

To make a call:
Enter the phone number you want to call and press Call button on your mobile phone.  A sound will be given from the speaker.

To receive / end a call:
Move your hand towards the Smart Sensor.

To speak in a call: 
Speak towards the microphone of the speaker. Location of the built-in microphone is indicated below:
 

Note: For some mobile phone models you need to select the speaker as the handfree source.