How to share Laptop internet connection with mobile?

[Andrew Logan]

You had not said which OS is you are using so I'll tell you how to do it on win 7.

open network and sharing center
then change adapter settings
right click the connection the dongle is using and select properties
click the sharing tab and select 'allow other users to use this computers internet connection'

This computer will now work as a gateway to other devices connected to your network.

you could also enable 3g on your phone, then use it's connection. Android phones are able to create hotspots. setting-> mobile networks -> hotspot - the phone will then generate a wifi hotspot and allow devices to use it's 3g connection (just like a mini router).