May mga SIM laws din ang ibang bansa na nag propose nito or batas na pero hindi naman nag lessen ang criminal activity.
Nacurious ako so I search to back up your claims, and to my surprise, yung findings na meron sila is pretty alarming na parang wala naman nangyayari. Much worse, baka nga mas nakakasama pa.
Some articles that describes the sim registration pros and cons in detail:
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https://www.fma.ph/wp-content/uploads/2018/02/Briefing-Paper-SIM-Card-Registration-FINAL-1.pdf-
https://firstmonday.org/ojs/index.php/fm/article/view/4351/3820-
https://www.gsma.com/publicpolicy/wp-content/uploads/2016/04/GSMA2016_Report_MandatoryRegistrationOfPrepaidSIMCards.pdf
I don't know pero parang pakitid nang pakitid yung implementation ng ganyang batas lalo na maraming exisiting research na nagsasabi na wala namang effect or mas maraming cons in the first place.
SIM registration has not been effective in curbing crime, but instead has fueled it: states which have adopted SIM card registration have seen the growth of identity-related crime, and have witnessed black markets quickly pop up to service those wishing to remain anonymous. Moreover, SIMs can be illicitly cloned, or criminals can use foreign SIMs on roaming mode, or internet and satellite telephones, to circumvent SIM registration requirements.
But yeah again, since wala naman choice, baka hindi rin ako agad agad magparegister sa ganyan kasi baka midway tanggalin yung effectivity nung batas.