I have to say, firstly, that I looked around amazon at loads of bluetooth headsets........ I have had many over the years, and as i find that they generally last around 12 - 18 months max with continuous use, i do tend to shop around for the good deals! Have to say that given the review average, this one seemed worth a punt........ However, upon pairing it and using it for a day, every single person i spoke to through it told me it was near impossible to hear me through. I spend most of my day in the car, with the phone on the dashboard, so it is never normally more than 3 feet from me. However, even when it is only that far from me the quality is terrible....... It literally sounds like the I am speaking from a wind tunnel. This effect was consistent, whether i was indoors or sitting in the car...... In all situations there was minimal to no background noise, so God knows why the headset sounds as bad as it did from the other end!!!!! If the phone is within 30 centimetres of the headset, quality improves a bit, but then why would i need a bluetooth headset if i have to hold the bloody phone almost next to it for it to work???!!! I doubt it is the phone, as my old lg headset still functions better from 10ft away than this one does from 30 cm!!!! PLUS, the lg went through the wash last week, prompting this purchase, and survived to outperform this nokia ....... Would love to be positive, but this truly is total rubbbish when paired with a HTC ONE X mobile........ I intend to send it back, just waiting on the seller to respond....... Will update as soon as they have been in touch to comment on their performance. Fingers crossed it'll be better than this headset!!!!