No ondraayyy and CDogs1964, the last I knew it did not work on mobile exports. The reason being is this
Most apps utilize a website, so when you setup your account, Facebook can make sure it only talks to requests for information from the websites you tell it are safe. With a mobile strictly app, there is no website outside of possibly http://localhost. Facebook does allow you to put localhost as a domain while testing your app, but when your ap goes live it will refuse requests from anyone but the developer from localhost. So you need to use one of the mobile settings in your developer.facebook.com app whcih requires some key. I've never made a mobile app so I'm not sure if the key is made by the app store or by you during the export process. I just know it requires some weird id in place of the website.
Last I knew, the standard Facebook plugin does not work on the whole key system, only on the website system. You would need to look up a third party solution. A user by the name of cranberrygame has a phonegap version facebook login and someone else has a parse.com version which I believe is mobile friendly, but check first. Look through the third party plugins section on the forums for more information on these.