Hi @schipanova.me, thanks for your reply.
It is quite strange because the Agora Plugin detects automatically default speakers, you might need to check your phone’s general settings.
For this please: Open the “Settings” app on the iPhone and head to “General”, then go to “Accessibility” Look under the Interaction settings for “Call Audio Routing” and tap on it. Change the setting from “Automatic” (the default) to “Speaker” to make speakerphone the default for all calls made to and from the iPhone. (Screenshot by Lightshot)
If this will not help try to find sound settings inside the browser you are using, under the Privacy settings.
Please try my suggestions and let me know if they helped.
Best regards,