I have used this headset with Nokia 3650 and with a usb bluetooth adapter for skype. For both use, the sound quality is very good. Recepients of my phone calls do not notice any perceptible difference between a bluetooth conversations and ones without a bluetooth headset. Although this is the only headset I've used, I believe it is one of the better ones on the market. The only negative would be the initial setup might seems somewhat cumbersome to some people. Some may find pairing up the bluetooth device and connecting the bluetooth device confusing.