Towards the end of last year, we learned that a group (allegedly affiliated with the Chinese government, referred to as “Salt Typhoon”) breached T-Mobile and other telecommunications companies and caused all sorts of havoc. This isn’t really a blog post about that incident, but it was the catalyst that inspired a bit of curiosity within me. I can’t (legally) access most mobile phone companies’ networks to see what vulnerabilities I can find, but there are plenty of open source software projects ...