That attack demonstrated on Linus channel, while it IS about SS7 I doubt it had SS7 interfaced in USA/Canada. Important details were left in that demo, while some hints were given. SS7 is definitely a thing in some countries though.
Linus channel demonstrated attack is not a direct one, but rather trickery, in way similar to domains 'apple.com' and 'аррle.com'.
I directly ask you: do you think there is at least one SS7 network in the USA or Canada, yes or no?
If you claim there are no SS7 networks in the USA or Canada, please explain:
1) why the FCC believes they exist and need to be secured, as per their March 2024 note
2) what the UMTS networks, still operational in Canada, are using for messaging (note the 2025 dates in https://en.wikipedia.org/wiki/3G#Phase-out for Canada; 2G/3G is still alive and well there. And I note that most of the 3G phase out in the USA was in 2022, not in 2014 which is what they'd have to be for you to not have seen SS7 for a decade)
3) what the POTS networks, still operational in the USA and Canada, are using for messaging (noting that FCC 19-72 only removes the requirement on ILECs to provide UME Analog Loops to CLECs, and does not require them to shut down POTS networks entirely by August 2022. For example, AT&T only plans to have transitioned 50% of its POTS network by 2025)
