iPhone Personal Hotspot lets you connect other devices to the Internet using the Cellular Data connection (2G, 3G) on your iPhone.
To activate the hotspot function, you need to install the latest iOS software update.
Once, the software is updated, go to the settings menu.
In the settings menu, you will see the personal hotspot item, tap on it.
Then, on the personal hotspot menu, switch the button to ON and choose a Wifi Password.
That’s it ! Go on your computer and scan the wifi networks. You will find the Iphone hotspot refered as the name of your iPhone in iTunes.
I haven't had any luck with this on ETL. It just tries to connect for ages. Anyone else?