Follow all the steps for the application to work properly and do not forget to apply post-installation settings.
Google has added a security system for apps that are not downloaded from the Google Play called “ Play Protect “. It is possible some rare conditions that the Cell Tracker application is detected as potentially dangerous. To prevent the app from being uninstalled, you must disable Google Play Protect and disable notifications related to Google Play Protect
Open “Play Store” application => Tap on Menu button => Select “Play Protect” => Select “Settings icon” => Disable “Scan device for security threats“.
Disable any of Battery saver, Sleeping apps, Background restriction options in your device. When battery saver is turned on, the system places restrictions on all apps. This is an existing feature that is improved with Android 9.x and 10.x.
Note : The list of Battery saver/Battery optimization/Power management options can vary between Android versions and Mobile models.
Settings => Manage apps => « GPS » Auto Start => Turn ON
Settings => Manage apps => « GPS » Battery Saver => No restrictions
Settings => Battery => More battery settings => Optimize battery use => « GPS » => Don’t optimize
Settings => Battery => Battery optimization => « GPS » => Don’t optimize
iManager => Apps => Special app access => Background power consumption management => GPS => Turn ON
Settings => Battery and device care => Memory => Excludes apps => Add apps => « GPS» => Add