2) Create Web Access Point Name (APN)

Open up your Windows Start Menu and find your Control Panel, within your Settings. Open up your Phone and Modem Options, and specify your local area code, carrier code (if necessary) and numbers that you may need to dial to access outside lines. Then choose whether or not your use a touch tone or pulse telephone connection and hit OK.

From there, select the Modems tab, highlight Standard Modems and click the Properties tab beneath the option. Once the Properties window opens, click on the Advanced tab at the top of the box and in the Extra Initialization Commands field type:

+cgdcont=1,"IP","Your Internet APN"

(Note: If you don't know your Internet Access Point Name (APN), you can contact your wireless carrier's customer support representatives. Or you can try to find your APN by clicking the Options icon on your BlackBerry Applications screen, then Advanced Options, and TCP. If the Internet APN name has been saved within the device, it will be listed in this menu. A good old Google search never hurts, either.)

Click OK once you've filled in the Extra Initialization Commands field and hit OK again when the Phone and Modem Options tab reappears.

BlackBerry as a Tethered Modem

3) Setup Dial-Up Networking Connection (Process Depends on Which Windows OS You Use)

Windows XP Configuration Process

Windows XP users: Open up your Windows Start menu, mouse over the Connect To option and then click Show All Connections. In the Network Tasks box in the right-hand margin, click Create a New Connection to launch the New Connection Wizard. From there, click Next, choose the Connect to the Internet option and hit Next again. Pick Setup My Connection Manually and hit Next again. Select Connect Using a Dialup Modem, hit Next. Select the Standard Modem option on the Select a Device screen, hit Next again. Within the ISP Name box, type a name for your connection (Carrier name, for example) and once again click Next. In the Phone Number field type *99#, and then select whether the connection is for you alone or for others, as well.

You'll then be prompted for the User Name and Password provided by your wireless carrier upon signing up for the tethered modem service. (If you don't know your User Name or Password, contact your service provider. Again, performing a Google search might help, as well) After you've filled in the appropriate information, click Finish to close the window and open the Connect window. (Some default User Names and Passwords can also be found online.)

When you've successfully created a new connection and the Connect window appears, hit the Properties tab at the bottom and ensure that the Standard Modem box is checked and highlighted. Then choose Configure. Check the Enable Hardware Flow Control box, make sure none of the other boxes are checked and then hit OK. When you return to your connection Properties box, hit OK again.

Windows Vista and Windows 2000 users: See additional information on how to configure connections for Windows Vista and Windows 2000 on RIM's site.