I love how this is painted as hacking when the root cause is an unrestricted number of telco subsideries that pay for access to the system, this then essentially gives them the powers and credentials to monitor, intercept, and clone anyone's phone and send/receive their messages/calls (Linus Tech Tips teamed up with Derek from Veritasium to show the extent to which it can be done, stealing his identity to intercept texts to and from his wife).
This is a product of the market deregulations of Capitalism. Capitalism is once again a security risk to citizens of free democracies. Shit happens all the time.