>>252569Telegram has intentionally weak metadata protection on the protocol level. This is well known thing. So, it is possible to make software which would analyze it. Russian surveillance systems exploit those weaknesses so if any Russian number is being registered on Telegram, it is instantly known to the surveillance systems. In Russia, you can get a phone number only by passport so (how does those systems know it? Well, Telegram has this feature dat it shows you who is using Telegram from your phone book. This is probably related to this functionality) (it is not known dat Telegram can decrypt secret chats, at least, I dunno dat. Though, even in secret chats, Telegram knows far too much metadata) (so, Telegram is not related to the Russian government)
So, dunno. So long you dont live in Russia you fine. If you live in Russia then FSB can just come and beat you until you unlock the phone or die, there is no difficulty here