There are so many reasons that GPS not responding to my voice commands?
Below are some of them:
# You haven’t download the latest version.
# Is your voice and text language the same?
# There can be microphone issues.
To solve this [https://gpscontactnumber.com/voice-command-not-working-in-garmin-gps/|Voice Command Not Working in GPS], you can perform a hard reset of your device, make sure you store all the backup of your device.
If problem not solved then feel free to contact Service Center.