i assume for people buying prepaid roaming sims or whatever there's no personal data? or is this not the case?
Post-paid generally is a lot stricter e.g. most telcos want 100 points of ID with at least one primary document such as driver's license or passport [2]. Not sure if that's a legislative requirement though, or just good business practice.
[1] https://www.acma.gov.au/acmas-rules-id-checks-prepaid-mobile...
[2] https://www.telstra.com.au/support/account-payment/id-check-...
They won't let you open a post-paid account if you've got a history of non-payment.
So about 1-2%.
All sims need personal data - otherwise overseas could be a loophole to get a ghost sim.
Do all countries require a ton of personal info to get a sim?
Why do we accept it as a given that the government must know who owns a phone? Is this necessary?