I have used this headset with my Nokia 6620 and with my PC, and it works great with both, switching back and forth easily by telling either the PC or the phone to connect with it.  Light crackling on occasion when 802.11b is active in the area, but not terribly noticeable.  Sound quality is great indoors.  The great thing is the comfort; I find that I can wear it all day long, even though it's not the smallest or lightest headset.