Tethering a Blackberry on AT&T

Much of this is ripped from forums.crackberry.com/f3/how-use-your-blackberry-modem-19093/ but it doesn't work for AT&T if you follow these instructions to a tee, so I modified it to work. Also these are primarily for XP, though I'm sure if you're savvy you can adapt them to Vista.

You need Desktop Manager loaded and running for set up and to actually dial up

Query the modem, using the modems properties:

1. Click Start, Settings, Control Panel.
2. Double-click on Phone and modem options.
3. Click on the Modems tab.
4. Left-click on the modem installed above. (Standard Modem or Standard Modem over Bluetooth)
5. Click Properties.
6. Click the Diagnostics tab.
7. Click Query Modem.
8. If dialog shows in the box, modem is responding
9. Click the Advanced tab.
10. In the Extra Initialization Command field, enter: AT+CGDCONT=1,"IP","wap.cingular"

Create dial-up networking :

1. From your computer, click Start, Settings, Control Panel, then Network Connections.
2. Click Create a new connection, then Next.
3. Select Connect to Internet.
4. Select Set up my connection manually.
5. Select Connect using a dial-up modem.
6. Select the Standard Modem, then Next.
7. Enter Blackberry or AT&T or something as the ISP Name.
8. Enter *99# as the Phone number.
9. Click Next.
10. Leave the User name and Password fields blank.
11. Deselect all the optional check boxes in the bottom portion of this window.
12. To create the connection, click Finish.
13. In the Connect window, click Properties.
14. In the Properties window, verify that Modem - Standard Modem appears beneath the Connect using heading, then click Configure.
15. In the Modem Configuration window, clear the Enable hardware flow control check box and make sure none of the other check boxes are selected. Click OK. In the Properties window, click OK.
16. Make sure there is no username or password in the Connect window
17. Select Save this user name and password for the following users.
18. Select the appropriate option.
19. Confirm that the BlackBerry Desktop Manager is running.
20. Click Dial

This whole arrangement works nicely over Bluetooth but I find it seems a little less laggy if I'm running it cabled. With 3G the performance is pretty darn good for basic web surfing, email etc. EDGE is a little laggy, but hey, it beats a poke in the eye with a sharp stick.

http://dledeaux.livejournal.com/4671.html