I can’t hear when I press the button for Siri

Enabling or Disabling Siri

1. Ensure your iOS device is compatible. ...
2. Open the Settings app. ...
3. Open the "General" section. ...
4. Select "Siri" from the list of options. ...
5. Tap the "Siri" toggle to turn it on or off. ...
6. Tap the Allow "Hey Siri" toggle to turn "Hey Siri" on or off. ...
7. Ensure location services are enabled.

Make Sure your Volume is turned up so you can hear

Invoke Siri by pressing and holding the Home button. Once you see the indicator for Siri on the screen, use the side volume buttons to raise Siri's volume.