[medvidek]

Personal anecdata: I get much more spam calls on a number from a country with mandatory ID sim card registration than on a number from a country where anonymous sim cards are allowed. Both numbers are almost 20 years old and I barely use them for anything but calls/sms to friends/relatives and receiving bank 2FA SMSes.

[Smoosh]

Personal anecdote from my wife yesterday. She doesn’t get many spam calls but has noticed that when a particular friend calls her, she gets a spam call later that day. I surmised that the friend has some spyware on their phone which is reporting “active” numbers.