I bought this unit based on Jabra's reputation to work with my Nokia 3650. I wanted something like this because my office is in the basement and I do not get a cell signal there. My phone is almost right above my head in my living room so I thought I would try it.I bought one of those taiwanese manufactured unit that looked like the jabra and I was able to hear very well around the house, in the basement and out in my backyard 9true 30 feet range...wow) but it was not compatible with the 3650, meaning the microphone did not work. So I had to return that one and bought the Jabra BT-250.No comparison. Jabra sucked. I could speak and hear as long as I was in close vicinity of the phone but No more than 7 feet of coverage (full charge), even less coverage as soon as you turn around the corner (and there I thought Bluetooth is not supposed to be a line of sight protocol...hmmm). To say that I am extremely disappointed would be putting it mildly considering Jabra's reputation. This one is going back.So now, I am buying one of the Nokia Bluetooth headsets and will see how that works out.