The G36 supports both GPRS and 3G data connections. To use the G36 for data, you must first have the relevant service activated on the SIM card by your network provider.
Installing the G36 as a modem
Download the Vista-specific drivers from HERE
Save the ZIP file to the Vista and PC and extract the contents.
Connect the G36 to the PC. Windows will detect the new hardware automatically:

Select the option to Locate and install driver software. Windows will not be able to locate the driver automatically:

Select the option to Show other options:

Select the option to Browse my computer:

Browse to the folder where you extracted the contents of the ZIP file you downloaded. Windows will then install the correct driver for the new hardware:

You will need to run through this procedure a second time as the G3x will be recognised by Windows as two pieces of hardware, follow the same procedure.
Once complete, you can verify that the new hardware is installed correctly by launching the Device Manager (Control Panel --> System --> Hardware), you should see 2 entries for the Ericsson device:

If you are not prompted to install the second piece of hardware, or you can see the device listed in the Device Manager with an exclamation mark on it, right click on the entry for the device and select the option to Update Driver. Then follow the above procedure to install the correct driver manually.
Setting up the Internet Connection
Open the Control Panel and double click the Phone and Modem Options icon.
Click on the Modems tab. Select the Ericsson G3x Fixed Wireless Terminal Modem and click Properties.
Click on the Advanced tab:
In the Extra initialization commands field enter the relevant settings for your network provider:
O2
at+cgdcont=1,”IP”,”mobile.o2.co.uk”
Orange
at+cgdcont=1,”IP”,”orangeinternet”
Vodafone
at+cgdcont=1,”IP”,”internet”
T-Mobile
at+cgdcont=1,”IP”,”general.t-mobile.uk”
3
at+cgdcont=1,”IP”,”three.co.uk”
Click OK, and OK again.
Return to the Control Panel, double click the Network Connections icon.
Select the option to Create a new connection. The New Connection Wizard will be displayed, click Next.
Select the option to Connect to the Internet and click Next
Select the option to Set up my connection manually and click Next
Select the option to Connect using a dial-up modem and click Next
Select the Ericsson G3x Fixed Wireless Terminal Modem and click Next
Enter a name for the Internet connection and click Next
In the Phone Number field, enter *99***1# and click Next
In the User Name and Password fields, enter the correct details for your network provider:
O2
‘web’ for both
Orange
leave blank
Vodafone
‘web’ for both
T-Mobile
leave blank
3
leave blank
Click Next
Click Finish
Your Internet connection has been created. To initiate the connection, simply double click the icon.