I have a Treo 650, that is paired to the HF820.However, with the Treo on, and within 3 ft, the HF820 turns itself off after being idle for about 5 minutes. The speaker is not the best, and the mic is poor.Also, it comes with a car charger, not a home charger. So, you have to have it plugged into the car cig lighter for 2 hours to charge it. This while your driving ! Very poor planning on Moto's part.There are better choices available.