What are the optimal settings for Geofencing on Android devices?

To achieve the optimal efficiency of Geofencing, please do the following:

Symptom	Importance / Reason	Solution / necessary actions
Presence detection: absence or presence is not correctly detected	Location sharing is disabled. The ViCare app does not gather any location information about your smartphone. ViCare can then not access your location, even if you are currently using the app.	The system should automatically detect when the ViCare app needs it and show a warning with the option to edit location services. If it doesn't work automatically, follow the instructions: Settings > Privacy & Security > Location Services > ViCare, and turn on the Precise Location feature
Presence detection: absence or presence is not correctly detected	Background refresh is disabled. The ViCare app should always run in the background so that it can always access your location services.	Settings > Data usage > Mobile data connection > Activate mobile data connection (in older versions "Wireless & networks" and data usage) You can select each app and see if Mobile Data is on or off.
Presence detection: absence or presence is not correctly detected	Mobile data is turned off, the Wi-Fi network is disabled, or there are general connection issues.	A poor internet connection can considerably affect geofencing. Ensure that your Wi-Fi network and the WLAN of your device are activated.
Presence detection: absence or presence is not correctly detected	The function restricts the background data, reduces data usage, and restricts background apps from accessing the Internet.	If ViCare users haven’t deactivated the notifications, they will be informed about the problem. Please note that these warnings are turned off on the latest Xiaomi devices.
Presence detection: absence or presence is not correctly detected	The battery optimization function ensures that the device battery lasts as long as possible and closes apps automatically if the user does not open the app frequently (daily).	If ViCare users haven’t deactivated the notifications, they will be informed about the problem. Please note that these warnings are turned off on the latest Xiaomi devices.
Presence detection: absence or presence is not correctly detected	Android 11 introduced a feature to automatically reset app permissions.	Settings > Apps > ViCare App > Permissions > Location > Always allow (so that ViCare can always access your location, even if you are not using the app.)
Presence detection: absence or presence is not correctly detected	Location services are misconfigured or turned off altogether.	Please check your location settings.
Presence detection: absence or presence is not correctly detected	WiFi has been turned off.	Please check your internet connection.