I've tried using my DESIRE with Bluetooth headsets from Samsung WEP series, Nokia, Sony Ericsson & Plantronics(expensive) & they've similar outcomes. If it's ok for Incoming calls, there are always problems with outgoing calls, vice versa.. I've been trawling all over the net for similar problems & feedback.. Some mentioned as an Android problem but mine is now Android 2.2.. it's the same.. I went to a HTC Concept Store & tried to no avail to get the guys there to assure me that HTC Bluetooth headsets will work well with a DESIRE?? Can any kind soul direct me to a solution.. Thanks in advance!!