4 Easy steps to turn your iPhone into a hotspot and connect your laptop to it so that you can access the internet via your iPhone’s 3G data.
Click on the the settings icon on your iPhone.
Once in Settings look for Personal Hotspot and click on it
Change the password to something easy like – 123456789
Then turn Personal Hotspot on each time to want to use it.
On your laptop search for wireless devices and connect to your iPhone using the password you setup in step 3