I bought this headset for iPhone 4 based on a very positive review I found on the internet; the reviewer who had tested about 10 BlueTooth headsets for iPhones found this one to be the absolute best.I don't agree. First of all its hard and un-intuitive to place on the ear, it's hard to understand the use of the 4 alternative earclips, and to change them requires so much force you wonder if you are about to break the device. Same for the non-standard connector for the USB-based charger (seems to be an excellent candidate for the ongoing competition "Who-can-make-non-standard-USB-connector-no.-100"), once put on it is so hard to pull off again after charging that you are wondering what breaks next.It random connects/disconnects with the iPhone, but I haven't been able yet to determine if this is due to the Jawbone or to the iPhone's poor BlueTooth implementation - or a combination.When in place and functioning it functions fine though!I can't recommend this item.