Please recommend a free vaccine for Android smartphones

A. 1

I don't really need a cell phone

Gentleman 7 years ago 0

OK

A. 2

If you don't receive and install the apk, there's almost no chance of intrusion
There's no need to use it heavily as a vaccine

Gentleman 7 years ago 0

OK

A. 3

You don't have to use a vaccine if you keep updating the os

Gentleman 7 years ago 0

OK

A. 4

When the financial app comes up, the vaccine comes up, but I'm not sure if I need to use it except for those times

Gentleman 7 years ago 0

OK