Had the Jawbone 2 and was having issues with crackling and echo sound as well as a general ear fit issue. The first gen Jawbone was better in my opinion. The headset was taken from my desk at work so I needed a new one and was not about to buy another Jawbone. Did some research, which lead nowhere beucase all the reviews pointed to the Jawboine as the best. I was talked into buying a Motorla H12 and I am glad I did. It is by far one of the best headsets I have ever used. The call quality and fit are amazing. I have not had ones issue with it and would recommned it to iPhone users. From what I understand the original units had issues,but they seem to be gone with the latest build.