I have a 6620 and just purchased a Nokia HF-3 potable car kit. The Nokia site said the 6620 was not supported, but I bought it anyway. Anyway, I plugged the car kit into my phone, and the 6620 first said "Charging", and then told me that the enhancement was not supported. Why??? Does anyone know if there are patches, drivers, etc. that Nokia puts out (or anyone puts out) to make Nokia phones work with Nokia enhancements? I think it would be fairly easy. Any thoughts?