Last updated: March 5, 2026
Google Assistant may not respond when you say "Hey Google" or "OK Google", fail to process commands, give incorrect responses, or not activate at all. This affects Android phones, Google Home devices, and other smart devices.
Voice Match not set up: Google Assistant may not recognize your voice.
Microphone issues: The microphone may be blocked or disabled.
Google app outdated: An old version of the Google app can cause issues.
Language settings: Assistant may not support your set language.
Battery optimization: Power saving may restrict Google Assistant.
• Open the Google app > Profile > Settings > Google Assistant.
• Make sure Google Assistant is turned on.
• Enable "Hey Google" voice activation.
• Go to Google app > Settings > Google Assistant > Hey Google & Voice Match.
• Tap "Retrain Voice Model".
• Follow the prompts to teach Assistant your voice again.
• Test your microphone by recording a voice memo or making a call.
• Clean the microphone opening.
• Make sure no case or accessory is blocking it.
• Go to the Play Store > Search "Google" > Update.
• Also update "Google Play Services" if available.
• Restart your phone after updating.
• Go to Settings > Battery > Battery Optimization.
• Find the Google app and set it to "Don't Optimize".
• This prevents the system from killing Google Assistant in the background.
• Go to Settings > Apps > Google > Storage > Clear Cache.
• Don't clear data, as this will reset all Google app settings.
• Restart the Google app and test Assistant.
If Google Assistant still doesn't work, visit support.google.com/assistant for help. You can also post in the Google Assistant community forums.
Q: Does Google Assistant work offline?
A: Some basic commands work offline on newer Android phones, but most features require an internet connection.
Q: Can I change Google Assistant's voice?
A: Yes, go to Google app > Settings > Google Assistant > Assistant Voice. Choose from several voice options.
Q: Why does Google Assistant activate randomly?
A: Background sounds may trigger the wake word. You can adjust sensitivity in Google Home app > your device > Recognition & sharing > "Hey Google" sensitivity.
Q: Does Google Assistant work on iPhone?
A: Yes, download the Google Assistant app from the App Store. However, it has limited functionality compared to Android since it can't be set as the default assistant.