Found this after some deep looking from blackberry itself: Good Luck
A BlackBerry smartphone with tethered modem capabilities can be
used as an external modem to connect a computer to the
Internet.
Summary of Tasks
To set up a tethered modem, complete the following tasks:
- Install BlackBerry Desktop Software 4.1 or later
(one time only).
- Set up the Internet access point name (APN) (one
time only).
- Configure dial-up networking (one time
only).
- Connect to the Internet using dial-up
networking.
Task
1
Install BlackBerry Desktop Software 4.1 or later on your
computer.
When you install BlackBerry Desktop Software, the drivers that
allow the BlackBerry smartphone to communicate through the
Universal Serial Bus (USB) port and virtual communications port are
installed. The standard modem, which is used by dial-up networking,
is also installed.
Note: If upgrading your BlackBerry Desktop
Software from version 4.0 to 4.1, the required virtual
communications port and standard modem might be removed during the
upgrade process. If this is the case, re-install the BlackBerry
Desktop Software 4.1 or later and choose the
Repair option to re-install these components.
Task
2
Set up an Internet APN.
- Click Start > Settings
> Control Panel.
- Double-click Phone and Modem Options.
- In the Phone and Modem Options window, click the
Modems tab.
- Select Standard Modem and click
Properties.
- Click Change Settings.
- In the Standard Modem Properties window, click the
Advanced tab.
- In the Extra initialization commands field,
type the following:
+cgdcont=1,"IP","<your Internet
APN>"
Note: The following is applicable for T-Mobile®
customers only:
The extra initialization command is:
+cgdcont=1,"IP","wap.voicestream.com"
Note: If you do not know your Internet APN, or
if you do not have an Internet APN, contact your service
provider.
- Click OK.
- In the Phone and Modem Options window, click
OK.
Task 3
To configure dial-up networking, complete the procedure that is
appropriate to the operating system you are using:
Windows Vista
- Click Start.
- Select Connect To.
- Click Setup a connection or network.
- Click Setup a dialup connection.
- In the Dial-up phone number field type
*99#.
- Type the user name and password provided by your service
provider.
- In the Connection Name field type
BlackBerry.
- Click Dialing Rules.
- Make sure the profile created in Task 2 has been selected, and
then click OK.
- Select Connect to establish an internet.
Note: For instructions on connecting a computer
to the Internet using a BlackBerry smartphone with CDMA as a
tethered modem, see
KB04664.
Windows XP operating system
- Click Start > Settings
> Network Connections.
- Double-click New Connection Wizard. The New
Connection Wizard opens.
- Click Next.
- Select the Connect to the Internet option.
Click Next.
- Select Set up my connection manually. Click
Next.
- Select Connect using a dial-up modem. Click
Next.
- If the Select a Device screen appears, select
the Modem - Standard Modem check box. Click
Next.
- In the ISP Name field, type a name for your
connection. Click Next.
- In the Phone number field, type
*99#. Click Next.
- Indicate which users will have access to the connection. Click
Next.
- Type the user name and password provided by your service
provider. Click Next.
- Click Finish.
- In the Connect window, click Properties.
- In the Properties window, verify that Modem - Standard
Modem appears beneath the Connect using
heading, and then click Configure.
- 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.
Windows 2000 operating system
- Click Start > Settings
> Control Panel.
- Double-click Network and Dial-up Connections.
Note: The following is applicable for T-Mobile
customers only:
Under the networking tab in the properties window for the
dial-up connection, clear the Enable LCP
Extensions check box, as well as all check boxes beneath
the PPP Settings window.
- Double-click Make New Connection. The Network
Connection Wizard opens.
- Click Next.
- Choose Dial-up to private network. Click
Next.
- In the Phone number field, type
*99#. Click Next.
- Indicate which users will have access to the connection. Click
Next.
- Type a name for your connection. Click
Finish.
- In the Connect window, click Properties.
- In the Properties window, verify that Modem - Standard
Modem is selected, then click
Configure.
- 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.
Task 4
Connect to the Internet using dial-up networking.
Note: During this procedure, do not operate the
BlackBerry® Browser or any third-party applications on the
BlackBerry smartphone. An active data session might interfere with
the modem connection. Also, make sure an ethernet connection is not
active at the same time.
- Connect the BlackBerry smartphone to the computer.
- Open BlackBerry Desktop Manager.
- Click Start > Settings
> Network Connections > <name
of your new connection>.
- Type the user name and password provided by your service
provider.
- Click Dial.
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