I tried the Jabra c220s with my Treo 700w and sound wouldn't come out of both speakers. This one works just fine. Great sound quality! However, I have two issues with this device:First, the earbuds don't stay in my ears. I guess I'm the small minority that doesn't have a shelf in my ear to keep it in my ear (and the way it would stay in my ear resulted in less sound delivered in my ear). I would suggest that you try other earbuds before trying this.Second, the connector isn't rugged enough to deliver consistent stereo. Frequently, when the connector was bumped, I'd lose stereo content (just one ear would work). I'm not sure if this is a Palm issue or the Boxwave. Considering the Jabra didn't work, it seems like Palm may have an issue with their connector - perhaps it doesn't completely meet the standard. I'd appreciate others providing feedback for other devices to see if this is a general issue for the Treos. Perhaps Bluetooth is the only reliable solution.