 <p>There is a warning on the <a href="https://developers.facebook.com/docs/reference/rest/" rel="nofollow">facebook</a> website,</p> <blockquote> <p>We are in the process of deprecating the REST API. If you are building a new Facebook app, please use the <a href="https://developers.facebook.com/docs/reference/api/" rel="nofollow">Graph API</a>. While there is still functionality that we have not ported over yet, the Graph API is the center of Facebook Platform moving forward and where all new features will be found.</p> </blockquote> <p>And according to <a href="http://stackoverflow.com/questions/5053723/how-do-i-send-sms-messages-through-graph-api">this</a> and <a href="http://stackoverflow.com/questions/5524694/sms-through-facebook-graph-api">that</a> Stackoverflow questions, there is no implementation available right now.</p>