Well, one of my cellphones is an Apple iPhone.
Because of a flu , that confined me to bed , i had the needed to use iphone to connect to internet from my mobile pc.

First of all:  You need a jailbreaked iPhone to do that, so if you don’t have one and you don’t want to make the jailrbeak … you can stop reading.

Well first of all i installed from cydia the program called iphonemodem. After that you need to install a little client into your pc. You can download it from here ( Mac version ) or if you have a windows pc from here

After that the configuration is simple. Launch the iphonemodem in your pc and push connect. This will create a new wi-fi network called iphonemodem. open wi-fi preferences in iphone and connect to that network, after that open modem application in your iphone and start to surf the web . Quite simple uh ?

How does it work ? ( From the official site )

iPhoneModem has two sides: the Modem application on the iPhone and the iPhoneModem helper for the Mac or the PC

On the computer, the helper application creates a new computer-to-computer (or ad-hoc) WiFi network and configures the system preferences to use the iPhone as a proxy.

On the iPhone, the application opens DNS, HTTP, HTTPS and SOCKS proxies and connects to the helper on the computer.