title: How to send a USSD Code to mobile phones
body: <p>I want to send and run a USSD code on mobile phones via PHP. I have an SMS gateway, can I send it through SMS or do I need to purchase an other service? I have been searching the net and didn't come to a solution that's perfect for me.</p>
  
  <p>Some company's support told me that I can send it using XML in SMS.</p>
  
  <p>The USSD command I want to run is :</p>
  
  <pre><code>    1. *21*___SOME NO____#
      2. #21#
  </code></pre>