I am unsure of what phone OS you have, but I have Android. What you are referring to is called "tethering". You want to use your phone's internet to give your laptop internet, if I am correct. The easiest app that I have found is called "Easy Tether". My phone is "rooted", but they also have an app for "unrooted" phones. The instructions are very easy to follow. Just download the app and follow instructions. I think you'll find it very useful. Good luck!