Traceability. I don’t know how it is in the US, but in Europe these days it’s relatively hard to get a SIM without having to show a form of identification. Sout

Traceability. I don’t know how it is in the US, but in Europe these days it’s relatively hard to get a SIM without having to show a form of identification. South-East Asia too, in 2013 they would just hand out SIMs like candy, but in 2016 the phone shop / stall that sold you the SIM (illegally) just signed the SIM under the sellers ID and I imagine its even more stringent now.