Sharing broadband connection via wireless

The step:

1. Enable Internet Connection Sharing. To do that, go to Network Connections and locate your 3G internet connection's dialer. Right click and select properties. From the properties window, select the Advanced tab. Tick the check box for to enable Internet Connection Sharing. Select Wireless Network Connection to enable sharing via WiFi.
2. Create a wireless computer-to-computer network (also known as ad-hoc network). At the taskbar, right click on your the Wireless Network Connection icon. A window opens to let you choose a wireless network. On the left side of the window, click on the "Change advanced settings" link. You will be directed to the Wireless Network Connection Properties window. On this window, click the Wireless Network tab. Click the Add button to create a new wireless network. Make sure you tick the check box at the lower left side of the window to make your new wireless network an ad hoc (computer-to-computer) network. Adding network security protocols are optional but recommended.
3. And that's it! Now go get another PC, Mac, PSP, iPhone, iPod touch, or whatever, and connect to the new ad hoc network you just created.