If you're experiencing issues with the microphone on your Logitech UE 4000 headphones, try the following:

• The cable for your headphones can be connected/disconnected from both ends — make sure both ends are securely connected to the headphones and your device.

• Make sure that the microphone is placed correctly — the straight connector should be plugged into the headphones and the right angled connector should be plugged into your device.

• Check that the microphone is not set to mute on your device.

NOTE: Some smartphones may not work with your headphones due to an incompatible connector/3.5mm jack. This can cause the microphone to not work.