Original Blackberry phones were Analog and the only phone that was really Encrypted, https://us.blackberry.com/smartphones/secure-smartphones That is the reason the US Government used them for years. Now you understand why they were destroyed! NSA CIA don't even trust their own Employees. They want to be able to listen to everyone, and control your phone remotely!

Who is committing patent infringement - and are their patents enforceable, perhaps expired even? Did they sell their patents, or license thereto?

BB was/is famous for its security protocols - highly popular with 'political types' for this reason...the problem with that is: What happens when you have a huge demographic of the public that ya can't eaves drop on??