How to hack an android or ios phone using sim cards

Lakatos told that he discovered this vulnerability back in 2015 but decided not to disclose it publicly until now because the process to patch such a flaw is complex and most importantly, can be abused by "bad guys to control phones running vulnerable SIMs remotely." Read More at https://hackhathon.com/2019/10/24/more-sim-cards-vulnerable-to-simjacker-attack-than-previously-disclosed/