Everyone I call or who calls me on my Treo 650 complains about a terrible echo. It's so bad sometimes I have to hang up and use a land line. I've tried all the volume and phone position solutions suggested in the Treo guidelines but none have made a difference. There is a little improvement if I push the phone very hard against my ear, but then I can only talk for a few minutes before the phone starts working through and coming out my other ear. Anyone have any suggestions?