**Describe the bug** A clear and concise description of what the bug is. **To Reproduce** Steps to reproduce the behavior: 1. display incoming call using callkit 2. answer the call 3. join channel 4. click speaker button on phone call ui **Expected behavior** toggle speaker for agora **Screenshots**  **Smartphone (please complete the following information):** - Device: [e.g. iPhone6] - OS: [e.g. iOS8.1] - Browser [e.g. stock browser, safari] - Version [e.g. 22] **Additional context** i think it's releated to https://stackoverflow.com/questions/48070163/callkitno-sound-when-i-use-webrtc
Describe the bug
A clear and concise description of what the bug is.
To Reproduce
Steps to reproduce the behavior:
Expected behavior
toggle speaker for agora
Screenshots

Smartphone (please complete the following information):
Additional context
i think it's releated to https://stackoverflow.com/questions/48070163/callkitno-sound-when-i-use-webrtc