Is it Anti-Theft neccessery?

Ok hi again guys…

I decide to protect my phone from viruses so I google it which is best. Find “CM Security” on phonespal but I am not satisfied at all with that program - already uninstalled. Second one mentioned in that article is Avast… I already install Avast Mobile, then I find Anti-Theft and I would ask you is it neccessery to have it and if yes - why?

Thanks to all.

https://www.avast.com/faq.php?article=AVKB66#idt_170

Looks like useful, but I don’t have now enough memory now, but maybe I should make to backup my phone. Tnx for link!

You’re welcome.