Likely causes
- Microphone permission denied for the app
- The talk control must be held while speaking on some models
- Audio muted in the app or by privacy mode
- Phone busy in a call or using the microphone elsewhere
- Camera speaker volume set very low
Quick checks
- Check microphone permission for the app
- Confirm you are holding the talk control
- Look for a privacy or mute mode switch
- Close other apps using the microphone
Step-by-step fix
Grant microphone permission to the camera app
Hold the talk button and speak after the prompt tone
Increase speaker volume in the camera settings
Disable privacy mode if enabled
Test from a second phone to isolate the handset