So you use a Blackberry phone. And you send out emails using PGP. Does this make your chats secure? Do you think no one can decrypt your texts and take out information? PGP Blackberry Secure Email Encryption does use a 256 AES encryption protocol combined with a 4096-bit RSA for the key encryption, but it only encodes the message body. Any tutorial on PGP will tell you not to include any sensitive information in the subject part. This is the reason why.
Remember that scene from "Skyfall"? Where James Bond brings in the anti-hero into MI6 headquarters and people are trying to access the data on his laptop? What did the scientist guy say? You type in a wrong password a couple of times, the data self-destructs.