The two articles about SS7 hacking in my bookmarks:

https://www.theguardian.com/technology/2016/apr/19/ss7-hack-explained-mobile-phone-vulnerability-snooping-texts-calls

https://www.bloomberg.com/news/articles/2021-12-06/this-swiss-tech-exec-is-said-to-have-operated-a-secret-surveillance-operation#xj4y7vzkg

Anyone knows about the advancement of the rollout of the replacement of SS7 in swiss phone operator networks, and its effectiveness to circumvent discovered loopholes over the years?