Samsung has a few remote apps via Samsung Dive so you can locate and wipe your phone if lost…not answering the OP’s question but might be handy to know.
Currently, there is no need for virus software, however, I suspect that is going to change in a relatively short period of time (perhaps before end of this year).
Apple has now seen it’s first ‘large scale’ ‘virus’ and patches are now out (I think) to sort the issue…suspect it won’t be that long before the mobile devices also suffer issues (although these will be harder to get on to the device in the first place).
Currently no issues, but be vigilant and don’t go installing everything you can on the device.
I’m no phone expert but I spend enough time playing with mine to think I have an idea…