This piece is half an advert but it’s the best article I’ve found that plainly describes the issue: https://www.telecomdefense.com/ss7-vulnerabilities/ https:/

This piece is half an advert but it’s the best article I’ve found that plainly describes the issue: https://www.telecomdefense.com/ss7-vulnerabilities/ https://www.telecomdefense.com/ss7-vulnerabilities/ TL;DR; The system that allows our phone networks to work together was designed decades ago with minimal security.