I use my Motorola H500 (they are reasonable priced) and it works fine. I used it with my previous LG...er..LGx350 I think it was(??) and it was perfect. I used it with my Smart phone (IP-8W30 by Samsung, crap phone that) and it sucked!! Couldn't hardly hear or be heard by others. I got my Rumor yesterday and have already had numerous bluetooth enabled conversations that were clear and fine.