BlueAnt Supertooth Light Bluetooth H/F I have experienced some glitches with this model of Blueant. the caller hears echoing on their end of the conversation. I have tried to lesson the echoing by turning down the volume of the speaker on my end, which helps but does not eliminate the problem. Some of my friends use the device without any feedback from echoing. I have a pocket PC-6700 Windows based phone. There is another problem; if you try to make a call using the BlueAnt device after a call has been made to another number, it may not recognize the new voice command and it will dial the previous number. This may be a problem only with the Pocket PC-7600 model. Talk time is excellent.