Install dependencies
yarn
Go to agora.io account (or create one for free) and in copy 'App ID' value.
Create .env file in the project root and add variable 'EXPO_PUBLIC_AGORA_APP_ID' with value from agora.io console.
Prebuild to make dev build (we can't use Expo Go). That will generate ios and android directories.
npx expo prebuild
Open /android dir in Android Studio
Run app on emulator or physical device or generate APK build. You have to use physical device to use cam.
Start server
yarn start
Make sure you are using development build and not Expo Go.
After starting server press 'a' to open app on Android device.
If you run app on 2 devices you can see the call immediately.