While using the app, consider the specific features of your device and follow the guidelines in the documentation for your device.
Kaspersky Internet Security has the following known issues:
On some devices, App Lock may work not as intended in the split screen mode.
On devices with Android 6, if you copy malware in a file manager app, Real-Time Protection does not find it. This is caused by registered known issue on Android 6. Because of that, the app cannot track changes in a device file system. If you start on demand scan, the app will find this malware. We recommend you to update on the latest firmware or to start on demand scan regularly.
On devices with Android 5.1 and lower with two or more SIM cards the app may not identify incoming calls on one of the SIM cards.This is caused by technical issues on Android 5.1 and lower.
Kaspersky Internet Security does not block incoming spam calls on the second line.