@RyGuy I'm glad to hear that the VAPI's React SDK is working well in the browser for your Next.js application. For the issue you're experiencing on mobile, there could be a few reasons why you're not hearing any audio during a call. Here are some steps you can take to troubleshoot the problem: 1. **Check Device Permissions**: Ensure that your mobile browser has the necessary permissions to access the microphone and speaker. 2. **Browser Compatibility**: Verify that the mobile browser you are using is compatible with the VAPI's React SDK and supports WebRTC. 3. **Audio Output**: Check if the audio output on the mobile device is correctly configured, and that the volume is not muted or too low. 4. **SDK Configuration**: Review the SDK configuration in your application to ensure that it's set up correctly for mobile devices. 5. **Network Issues**: Sometimes, network restrictions on mobile networks can affect audio streams. Try connecting to a different network, like Wi-Fi, to see if the issue persists. 6. **Debugging Logs**: Utilize console logs to check for any errors or warnings that occur when you connect to a call on mobile. 7. **Test with Different Devices**: If possible, test the call on different mobile devices to determine if the issue is device-specific. If you've gone through these steps and the issue still persists, it might be helpful to look at the specific implementation details or any error messages you're receiving. If you can provide more information or need further assistance, please let me know!