For some time I protect my or our mobile devices (three smartphones of Samsung and Sony, as well as a tablet from Samsung) with the security software of the Finnish manufacturer F-Secure. In this case, here is a pure online download version again. Is supplied in an A4 envelope a folding carton containing a visualization of an installation instruction and especially for a coupon code that allows you can register.
A manual virus check one encounters on the device itself when the routine checks do not appear sufficient. But you also get access to a so-called "SAFE portal", but on the one lock a entwendetes device or can locate lost.
Advantage of this solution here is the two-year validity, while many other variants always apply only a year and then you have to extend.