1. Nokia uses a Dedicated field for modem named PACKET DATA other than profiles that used by Mobile itself to access internet.
You have to dial *99# from your pc. it will dial whatever APN
you selected in PACKAET data of your Nokia mobile..
2. Sony ericsson have the same Profiles both for mobile and Modem through P.C. . You can dial diff. diff. profiles by dialing that no. from pc.
*99***1# means you are dialing first profile of your mobile
*99***2# means you are dialing second profile , According to you
dialed profile relevent AP would be dialed
3. In motorola First of all you have define in your mobile that USB cable you are using is for DATA To do this goto MENU >> settings >> usb >> n make DATA as default media. After this your mobile will work as a modem now You have to add EXTRA INITIALISATION COMMAND
from your P.C. and it will override evry setting of your mobile and P.C.
( You can use this in any mobile if you are facing problem in connecting)
To add E.I.Command goto Properties of Your Mobile Modem and click on
ADVANCE TAB. Here you can add this E.I. Command