Yeah it's pretty crazy. I got the
Motorola HX550 and it sounded like complete *** on my iPhone 4. Motorola was nice enough to give me 3 replacements, and didn't have any gripes whatsoever. I tried a Jawbone 1 and a Jawbone era, previously. Everyone told me I sounded like the connection was "tinny" and I've got a pretty deep voice. Unanimously, everyone said I sounded 100 times better without it. That's a pain for me since I spend a ton of time talking on the phone - a TON of time.. The last one I got for the iPhone 4 was that Moto that I linked. Sounded bad on the iPhone, but then I connect it to the HTC One and people say that can't even tell that I'm on a BT headset. So I've been using it and am pretty pleased with it. Battery life has been stellar and I can pop it in my pocket since I don't use that ear loop. It folds up and fits anywhere and it connects with no issues whatsoever. Hopefully the One has some better support for BT so I'll likely try something else after this one wears out. Hopefully the next one doesn't yield the same results as I had before with sounding awful.