Why is BlackBerry the safest mobile phone?

There are mainly the following reasons:

1, Blackberry is a closed-source system with high system authority. You need authorization to develop software, so don't worry about viruses and malicious legal copies (high software development cost and poor environment).

2, BIS, BES services, only send emails through BlackBerry's own server, and no one can listen and talk, including state organs.

3. The popularity of BlackBerry system is not high, and criminal gangs have no motivation to develop viruses of this kind of system.

4. Blackberry system itself is encrypted, and there is hardware encryption. Blackberry can encrypt each other by calling, sending emails, sending short messages, etc.