Re: What next?
Foreign travelers to install a "Visit Russia" App during their stay?
When I visited Russia a dozen years ago foreign visitors were supposed to register their mobile phones upon entry. No-one ever asked me for my number at any stage so I didn't go looking for a kindly policeman* to report myself to. My phone automatically picked up a connection (presumably due to whatever roaming agreement my provider had at the time) and I assumed that would give them all the info on me they wanted.
* The joke goes that if you want to tell a kind Russian militsia from an unkind one, pick the one who spends his day harassing gypsies rather than the one who is stopping motorists to extort a bribe.