:-)
I posted an initial reply and then posted another reply which resulted in my first reply to be deleted. Must be some quirks of the blockchain!

In my first reply I was saying that I understand completely that there is a lot to digest here, especially for people not in this industry.

I hope that these posts are a good starting point for people who might be starting a career in the field of mobile communications or just people with a keen interest for the technology.
It might be interesting as well to compare the security in cellular networks to the security mechanisms used on the Internet.

Anyway, don't despair. This was probably one of the hardest post to digest about this subject! ;-)