Since I just got a work-issued Treo 650, this has become a bit of a quest for me. I have unlimited data access via AT&T/Cingular, and wanted to use the BT connection on the phone for Internet access on my hx4705 ppc.
Little did I know, this is ONE CONTROVERSIAL SUBJECT!!! Check out these sites for more on the issue of mobile providers INTENTIONALLY turning off the DUN features on BT enabled phones. Apparently they are doing this to disuade users from using their phones for anytime/anywhere and reasonably priced Internet access on laptops and devices like Ipaqs.
http://www.shadowmite.com/ http://discussion.treocentral.com/sh...0&page=1&pp=20
By the way, I have yet to get mine to work. My AT&T/Cingular rep explained they are issuing a update ROM patche to allow these types of connections in the next few months. Yeah right...