Follow the steps below to manage calling with your headset:  

• Answer a call: Short press MFB.
• Reject a call: Press volume down 2 seconds.
• End a call: Short press MFB.
• Change call volume: Press the volume up and volume down button.
• Mute or unmute a call: Press volume down 2 seconds during the call and press volume up 2 second to unmute.

Note: Some features are phone/network dependent.