How to view form embedded on Facebook on my mobile device

You may consider adding first your form to your Facebook Fan Page if you have not done it yet. Use this guide: http://www.jotform.com/help/123-Adding-forms-to-Facebook-Facebook-Developer-Method-  

JotForm has already been optimized for mobile views. Form works just fine on iPhones and Smartphones. Fields can be filled easily and they just fit properly on mobile devices.

Considering forms that are embedded of Facebook there can be a problem with displaying forms on mobile. Problem is related to the Facebook itself. You may check the following thread on Stackoverflow:

Is it possible to show a Facebook app as a Page Tab on mobile devices?

Hope this will help. Let us know if you need further assistance.