Microphone is not working
Edited
If the microphone is not working on your earbuds, please make sure the headphone jack is plugged all the way into the phone. Please remove any case or skin while troubleshooting as they could get in the way of the headphone jack and prevent a secure connection.
Does the microphone work now?
If the microphone is still not working, please try plugging the ear buds into a different phone.
Does the microphone work when the ear buds are plugged into a different phone?