title: Linphone SDK - how to turn on loud speaker
body: <p>I am building a video chatting app via the Linphone SDK.</p>
  
  <p>There is an issue that when someone "receives" a video call, the loud speaker is off by default, so users need to use the phone speaker, the one used for phone call, rather than the loud speaker. However, at the same time, the one who gives the call has the loud speaker on by default.</p>
  
  <pre><code>LinphoneManager.getInstance().routeAudioToSpeaker();
  </code></pre>
  
  <p>I thought this is the code for which Linphone turns on loud speaker, but actually it's not. </p>
  
  <p>How do I turn on loud speaker when users receive video calls by default?</p>