Original iPhone 11 Pro Max loudspeaker :

Diagnosis justifying the replacement of your loudspeaker:

You can replace your external speaker if you have the following problems:

• You no longer hear your iPhone ringing during a call
• Speaker sizzles when listening to music

CAUTION: an external speaker no longer working can also be due to a fault in the charging connector because the iPhone external speaker works through contact made with the charging connector.