Platronix is well promoted and popular. I had Voyager 925 - it was terrible, and this legend is not much better. this ganitura is good only in one mode - behind the wheel. Attention - it is impossible to use it on the street, the wind, the noise of the street - the interlocutors go crazy. customers are not satisfied - they ask again a hundred times, as in the 925 model. I bought two of these legends - one for myself, one for my partner - bad. dissatisfied. use with iphone 5. for professional purposes - for example, it is impossible to process clients with this headset. the voice sounds squeaky, with an unpleasant whistling resonance. and another spike. like not to complain. when a person says there is a thorn. when silent - no. firmware does not change the case.