with motorola phones, i heard you have to downgrade your firmware to allow you to use DUN.

I don;t have a data plan. it just uses minutes although the calls show up as data calls on my bill. it could violate your TOS but thus far, no one has ever gotten charged as long as you don;t abuse it.

the instructions are here for LG phones

http://www.howardforums.com/showthread.php?t=938352

could not get my blackberry 7250 connected though.