The SimJacker vulnerability was disclosed a month ago and can be remotely exploited to hack into any mobile phone just by sending a specially crafted binary SMS. The vulnerability resides due to a lack of authentication and proprietary security mechanisms implemented by dynamic SIM toolkits that come embedded in modern SIM cards. 29 affected countries across five continents, where customers of a total of 61 mobile operators are using vulnerable SIMs with S@T Browser toolkit. There are only 8 mobile operators in 7 countries who are actively using the vulnerable WIB toolkit on their SIM Cards.
Source: https://thehackernews.com/2019/10/simjacker-vulnerability-exploit.html