But surely the victims are not sophisticated enough to google numbers?

And even if they are, how hard can it be to find some poor people to go get 10 sim cards for 10 euros? I know that wouldn’t be hard at all in my village.

Or to just corrupt one guy working for the telco and get unlimited SIMs registered using fake IDs?

Or not corrupt anyone and just go get SIM cards with trivial to fake Romanian ID cards?