These Settings must be properly configured to keep Mobile Tracker Free working.
Info: A password may be required to access the application settings. If you have not changed, the default password is *1234*. More information about the application password here.
1) iManager => Apps => See all X apps => « Wi-Fi » => Mobile data & Wi-Fi => Background data & Unrestricted data usage => Turn ON
2) iManager => Apps => Special app access => Autostart => Wi-Fi => Turn ON
3) iManager => Apps => Special app access => Background power consumption management => Wi-Fi => Turn ON
4) iManager => Security scan => Settings => Regular scan reminder => Turn OFF