Was a silent lurker but did want to thank you as i have the device now working as a modem. If i may, a brief amendment to your suggestion. What worked for me is not your suggestion but:

AT+cgdcont=1,"IP","WAP.CINGULAR","",0,0
This can be seen at http://www.ppcw.net/index.php?itemid=1369&catid=4

My humble apologies of the 'bad netticate' for linking to another website. i did not write the above article, have no relation/financial/etc to it.

Basically, used YOUR settings for username and password BUT used AT+cgdcont=1,"IP","WAP.CINGULAR","",0,0    .  Also, there was no need to make ANY changes to the MPx220 config on the Cingular phone itself (with newest firmware). The phone itself was already configured properly. All i needed to do was enable the Modem Link on the phone and then plug in the Data Cable to my computer that already had the proper MPx220 modem driver as supplied from the Motorola website at http://www.motorola.com/mdirect/hellomoto/...h/default.shtml

Hope this all makes sense, just trying to help.

Enjoy the Music,

Steven R. Rochlin

With phone power off press and hold the blue button and power on the phone. It will ask you if you want a master reset. Say yes...