Disadvantages: 1, there is no camera, although even if I have it, it is basically used for display, but in some specific cases, it is better than nothing; 2. The trackball in BlackBerry needs to be taken out and cleaned regularly. Although it's easy for most people, if the mobile phone doesn't work well, choose the Blackberry with Xinguang board (9700, 8520)~3. It is troublesome to synchronize the mobile phone address book with the sim card address book, but all the short messages, emails and phone calls in the mobile phone, including settings, can be downloaded to the computer through the desktop manager, which can save some face.
Summary: Although there is less software for BlackBerry, I think it is enough. As a user from Saipan, I am deeply impressed by the humanization of BB.