You can use Samsung Captivative (Galaxy S) as a modem for a PC to access the internet.
1. In Idle mode, open the application list and select Settings → About phone → USB settings → PC Internet.
2. Press the Home key to return to Idle mode.
3. Using an optional PC data cable, connect the multifunction jack on your device to a PC.
4. When the installation manager appears, follow the on-screen instructions to complete the installation of the software. Once the installation is complete, the window to activate an internet connection will appear.
5. Create a modem connection on your PC.
6. Select the created modem connection and enter an ID and password provided by your service provider.
1. In Idle mode, open the application list and select Settings → About phone → USB settings → PC Internet.
2. Press the Home key to return to Idle mode.
3. Using an optional PC data cable, connect the multifunction jack on your device to a PC.
4. When the installation manager appears, follow the on-screen instructions to complete the installation of the software. Once the installation is complete, the window to activate an internet connection will appear.
5. Create a modem connection on your PC.
6. Select the created modem connection and enter an ID and password provided by your service provider.