title: Firebase notification sound for IOS
body: <p>I send a Firebase notification from my java server.
  I need to specify the sound to IOS to be &quot;default&quot;, cause right now I get no notification sound.
  I saw similar questions but none is in Java server code.</p>
  <p>I understand that I should deliver something like this:</p>
  <pre><code>apns: {
      payload: {
          aps: {
              sound: &quot;default&quot;,
          },
      },
  },
  </code></pre>
  <p>And my IOS developer says that he gets something like this:</p>
  <blockquote>
  <p>FCM Message Data: {&quot;data&quot;: {}, &quot;messageId&quot;: &quot;1646649783631300&quot;,
  &quot;mutableContent&quot;: true, &quot;notification&quot;: {&quot;body&quot;: &quot;test&quot;, &quot;ios&quot;: {},
  &quot;title&quot;: &quot;test&quot;}, &quot;sentTime&quot;: &quot;1646649783&quot;}</p>
  </blockquote>
  <p>What should I provide in notification data for the sound to be heard in IOS?</p>