If you say "Hey Google" near two or more devices, such as your Google Nest or home device and your Pixel Tablet or phone, multiple devices might turn on. Only one of the devices should respond.
Google selects the best device to respond to based on various factors, such as:
- Proximity of the device
- Type of request
- Capabilities of the device
Step 1: Update your Google app version
- On your phone or Assistant-enabled tablet, open the Google app
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- Tap your profile
Settings
- Check the version number.
- If your version is below 6.5, go to the Google app page.
- Tap Update.
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Settings 
Step 2: Add the same account to both devices
Important: If the phone that responds isn't yours, these steps won’t fix the issue.
If you have multiple Google Accounts, add the account you used to set up Google Home to your device.
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Add another account.
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