


To enable the debug menu, you need to enable it from the preferences tab.
You'll see a new "Develop" menu has appeared. Now to the thing what this post is all about. From the Develop menu, set your user agent to "Mobile Safari".
Now just go to any site that has special pages for iPhone, my Gmail Looks like this.

And this is my how my Facebook profile looks in iPhone.
And you never had to use an iPhone to check it out.