SS7 is vulnerable to attack. However, the types off attacks on the video don’t affect Signal as it requires a pin. (Make sure you set your pin to something strong and secure)
Mobile networks are awful and are very easy to spy on.
But the video is worth every minute.
I don’t particularly like Linus, but he was bearable in this video. As someone who assumed this was a SIM swap, I was genuinely as confused as he was playing it up when he was able to place calls but not receive them. That was really interesting.
Linus is great. Sure he has his flaws but of all the flawed people he doesnt have horrible ones.