Security researchers at Adaptive Mobile who discovered the SimJacker issue have published the list of countries where mobile operators use flawed SIM cards. The vulnerability resides in the S@T (SIMalliance Toolbox) Browser dynamic SIM toolkit that is embedded in most SIM cards used by mobile operators in many countries. The experts discovered that that the exploitation of the vulnerability is independent of the model of phone used by the victim. A private surveillance firm was aware of the zero-day flaw since at least two years and is actively exploiting it.”]
Source: https://securityaffairs.co/wordpress/92404/hacking/simjacker-attack-countries.html