The Nest or Home app will ask you to update your phone's settings if there's something you can do to improve how Home/Away Assist works for you.
Your app regularly checks your phone or tablet settings to help make sure that your home switches between Home and Away as accurately as possible. If it sees that you can change a setting to make it work better, it will let you know by alerting you when you open the app. You'll see a customized list of things that you can change on your device. Be sure to change the suggested settings, but you may also want to check all the settings below if you haven't already.
Note: The Nest or Home app will only show you the Phone location screen no more than once a week so you won't see it every time you need to use the app.
If you don't want to change your settings, you can set your app to not use your phone's location.
- In the Home app, go to your Home settings and tap Presence sensing.
- In the Nest app, go to Settings and tap Home/Away Assist.
Airplane mode can help save battery charge since it disables Wi-Fi, cellular data, and Bluetooth, but you may have forgotten to disable it. Make sure the airplane icon is turned off.
Wi-Fi is one of the most important settings because it affects location accuracy. Make sure the Wi-Fi icon is highlighted in Settings for Android or in Control Center for iOS.
- Go to your phone's Settings and select Location. Make sure that it's toggled on.
- Under "Advanced," check that "Google Location Accuracy" is on.
Location Scanning is another important setting because it affects location accuracy.
Go to your phone's Settings and select Location, then make sure that Wi-Fi scanning is set to on. It lets your phone use Wi-Fi to narrow down your location even if you have Wi-Fi turned off.
Android
Go to your phone's OS Settings and tap Network & internet 
iOS
Open Settings and select Cellular. Make sure the cellular data switch is green to show that it's set to on. It helps ensure your home switches as quickly as possible when you leave or come back.
Important: If you have also set a cellular data limit to prevent additional charges, Home & Away Routines or Home/Away Assist won't be able to use cellular information after you have exceeded your data limit.
Android
Go back to the App info screen and tap Permissions. Make sure that Location is on. It lets the app get data from Android's location services.
Note: The app uses the standard location services built into Android. These services use a combination of cell tower signal strength, Wi-Fi network information, and occasionally GPS to narrow down your location if needed.
Don't restrict background data
Tap Data usage and make sure the Restrict app background data is off.
It's an essential setting to make sure the app can help control your home even when the app isn't running.
Enable cellular data
Cellular data is an essential setting to have on. Turn it on to make sure the Nest or Home app can switch your home when you don't have a Wi-Fi connection.
iOS
- Go to Settings and tap Privacy
- Tap the switch to turn Location services on.
- Scroll down and tap the Home app then set "Location Services" for the app to Always. If you also use the Nest app, do the same for it.
Each app that uses Location Services has an individual setting. It should be set to "Always" for the app. It lets the app switch your home between Home and Away modes even if you don't have the app open.
Enable Background App Refresh
The Nest or Home app needs Background App Refresh turned on for Home & Away Routines or Home/Away Assist to work.
Enable cellular data
Cellular data is an essential setting to have on. Turn it on to make sure the Nest or Home app can switch your home when you don't have a Wi-Fi connection.
In the Home app, select Settings
- Presence sensing is turned on for your phone.
- Turn presence sensing on if you want to use your phone's location to determine your Home or Away status.
- Turn presence sensing off if you only want to use your home's devices to determine Home or Away status.
- Your phone is accurately showing your current status as Home or Away, depending on your location.
- All members of your household have enabled presence sensing on their phones
- You've turned on presence sensing for all the devices that you want to contribute to this feature.
Turn presence sensing on or off
- Open the Google Home app
.
- Tap Settings
.
- In the "Home features" section, tap Presence sensing.
- Tap the switch next to Allow this home to use phone locations to turn it on or off.