There are a few possible reasons why your iPhone microphone is not working when connected to your car through Bluetooth. Here are some troubleshooting steps you can try:
- Check the Bluetooth connection: Make sure that your iPhone is properly connected to your car's Bluetooth system. Check the Bluetooth settings on both your iPhone and car to ensure that they are paired and connected. If your car has a touchscreen display, make sure that the audio source is set to Bluetooth.
- Check the microphone settings: Check your iPhone's microphone settings to ensure that it is set to use the phone's built-in microphone instead of the car's microphone. To do this, go to Settings > General > Accessibility > Call Audio Routing and make sure that "Automatic" or "Speaker" is selected.
- Check the car's microphone: If your car has a built-in microphone, check to see if it is working properly. Try making a call using the car's microphone to see if the person on the other end can hear you.
- Check for software updates: Make sure that your iPhone and car's software is up to date. Software updates can often fix bugs and issues with Bluetooth connectivity.
- Restart both devices: Try restarting both your iPhone and car to see if that resolves the issue.
If none of these steps work, you may need to contact your car's manufacturer or Apple support for further assistance.