Can you use an iphone as a modem for a macbook air?

I work in a remote location with no wii fi for about ten miles. I could buy a prepaid modem using a phone sim card that will accept five different devices for your own local wii fi, but i don't want to spend the extra cash when i already have something that is internet capable.
Yes, i know i can use my iphone for internet itself, but the screen is too small, and it is limited in what you can view and download.
please let me know if there's any way this can be done.

Nope, you can't do that! IPhone can't be the modem!

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