title: AWS SNS / SMS: Accented characters look garbled on the phone
body: <p>I'm sending a message containing accents like so:</p>
  
  <p><code>sns.publish({ Message: 'Olá, Jean', PhoneNumber: '+55...' })</code></p>
  
  <p>But it gets rendered <code>Ol?ean</code>. How can I fix this?</p>
  
  <ul>
  <li>Platform: NodeJS.</li>
  <li>aws-sdk version: 2.6.9.</li>
  <li>SNS API version: 2010-03-31.</li>
  </ul>