It should be BlackBerry. BlackBerry refers to a terminal that supports BlackBerry service. Blackberry business refers to the business form in which e-mails arrive at the mail servers of group customers and are actively pushed to the mobile terminals of individual group customers (that is, BlackBerry as you said) through end-to-end secure connections, so that they can receive, reply, forward and compose e-mails anytime and anywhere. This business integrates excellent software, services and hardware in the industry to provide end-to-end enterprise wireless solutions for the company environment. BlackBerry not only supports e-mail, but also supports PIM synchronization functions, such as two-way synchronization of calendars, meetings and meeting minutes, automatic deletion of expired mails and mail search, various e-mail systems (Lotus Notes system, Microsoft Exchange system or Novell GroupWise), centralized management function and the use of BlackBerry.net's proprietary APN. Blackberry business has covered more than 20 countries and regions around the world/kloc-0. It adopts the solution of wireless packet data push, which can handle e-mail conveniently, timely and safely through BlackBerry terminal, and can access other applications within the enterprise. To use this service, you only need to install BlackBerry Enterprise Server behind the enterprise firewall to provide secure connection between mobile users' handheld devices and the company network. Blackberry's mobile informatization solution is based on BlcakBerry mobile terminal, which combines the internal office, production, sales, finance and personnel management needs of group customers to provide corresponding solutions for internal informatization of group customers. For example: real estate sales system, policy inquiry system, mobile accident handling system. It can also provide all users with business applications such as stock, foreign exchange information inquiry and trading, real-time news, information inquiry service based on e-mail. With the launch of BlackBerry service in China Mobile, users can send and receive emails freely through their mobile phones, which has the characteristics of practicality, functional diversity, encryption security, terminal richness and timely service. To sum up, if the purpose of using your mobile phone is just to make phone calls, send text messages, etc. It doesn't apply to BlackBerrys.