I have an Intel laptop with Wi-Fi running Windows Vista, and connected to the Internet using the Huawei 3G key. Can I share this connection using Wi-Fi with another laptop/device?
I can't find an ad hoc Wi-Fi network option, maybe because I'm not using a wired connection.
Any solution?
Yes you can.
Go to Network and Sharing Center and click Manage network connections, Right click on the 3g connection and go to properties and on the advanced tab, choose Share This Connection and choose the wireless card.
Next, to set up the ad-hoc connection:
Simply go to Network and Sharing Center and click on Set up a connection or Network
Next, choose the Ad-Hoc option.
Follow the on screen instructions and on the other machine, you should now see the name of the network when you scan from the second machine.
It should all be working now.
3G and Wi-Fi (as in "regular" wireless cards) are not the same thing. 3G is, I believe, a trade name for WiMAX standard. If you mean, sharing the connection via regular wireless cards while being connected to 3G, I guess it would be possible, but IMHO, unusable, since 3G are not exactly broadband connections.
Make sure the WLAN controller is turned ON.
For most laptops you'll have to use a FN key combination to toggle wireless on/off.
Some laptops have a physical switch:
In most cases WLAN ON is indicated by an LED.
