In Germany, you have to give ISP customer providers (help centers) a copy of your passport ID in a live video stream to authenticate. That was introduced since 2013, for all SIM registrations.
So explain to me, again, how did this help reduce botnet traffic from Russia that uses proxy services of third parties that installed their proxy backdoors in free apps on the PlayStore under the disguise of marketing and advertisement?
I don't understand why Google does not get any critique for allowing so much malware to be officially deployed via their PlayStore? They don't give a damn, have a history of not caring, and are the only point in the supply chain that is the problem. Every service provider that offers residential proxies is using those backdoors, and bought access for it from the advertisement companies.
If you report their Malware or Spamware, they ignore it. Try it, you will be disappointed. Because AdMob and other agencies are their customers. It's the same problem with Microsoft hosting Azure tenants that do spamming, sorry, "marketing campaigns".
Source: I track these companies and their rotating ASNs with zero tolerance for spam. [1]