This seller should clearly not be supported by Amazon, unless they do not care too much about their reputation. The product is a cheap knock-off, not only is the mic not working on 2 out of 4 earphones I ordered, it is not even the model as shown in the pictures and advertised (no volume control!!), the rubber cable covering was ripped on one of the earphones and it has stopped working properly since, after 3 days use. Stay away from this seller!
If you have had similar experiences (and you probably will have, unless you are employed by the seller in order to provide positive reviews), please like this review and keep it on top, as a warning for other buyers, so they don't fall in this trap. thanks.