Karspersky for Internet Security is a great software for desktops and I have been using it for several years. However, it turned out to be a disaster for my android phone Nexus 5. I installed the Mobile version of Android phone. The phone became locked and spent a great deal of time to get into it. It behaved erratic. It could not be swiped and many important functions became inaccessible. I tried factory reset which failed after many attempts. Perhaps some problems with the re-boot files or something like that. Tried to get help from Karpersky Help desk. Not helpful at all. You asked question A and they reply for B. Seems they don't read email properly, and don't know the answers. Any way, the phone is now a piece of garbage and I have a get a new phone.