Works well w/ my RAZR v3c. Calls were clear, no complaints on static or muffled sound.However, apparently my ear is smaller than average, so wearing it for prolonged periods of time is uncomfortable. Will probably exchange it for a Motorola H3.I've used Motorola H500 and Jabra BT150 and honestly, I could not tell the difference between any of them. The DSP tech is lost on me.