How to put a cover photo on Facebook with an iPhone?

I don't have access to a computer and I was wondering if I can put a cover photo on it with my iPhone 4 (not 4s) the picture is more then 720 pixels.

Http://abrax.us/Facebook/MobileCover.php

Yes, you can by access your facebook profile via facebook for iphone application then you'll see a button that allow you to change on your cover photo there.