The possibility of using your Windows Phone as a mobile hotspot (accesspoint) was originally a function reserved for new Mango units. This week HTC changed that when releasing an update for HTC HD7 og Mozart. I have the Mozart model and was soon to update my phone. The update is only through Zune on your PC.

With internet sharing (tethering) you can share your internet connection with up to 5 guest units, and the sharing is automatically getting disabled after a few minutes of inactivity so that you can save the battery life on your phone.

Remember to not use internet sharing when abroad (so called roaming). It can fast get very expensive!

internet sharing is found under Settings on your phone. The functionality is set up with a predefined password that I recommend you to change under setup. You can also change the broadcast name if you want to, but I recommend you to keep WPA2 as the security type for the wireless connection.