I bought this to replace the original blackberry earphones as these are "in ear" and being on the relatively expensive end of things thought they would be a step up in quality. They are not original and are rubbish. The button on the microphone is loose, so if you move it taps against the mike. A small but clear sound your end - an ear piercing crashing to the listener. This may be just a fault with mine, but I would be surprised - it is cheap and tacky rubbish. It should be removed from Amazon for mis-representation - what does "genuine retail pack blackberry premium" mean? I probably would not mind so much if they charged a pound, but selling rubbish as quality and hiking up the price is criminal.