Advantages: 1, generous body, good hand feeling, and satisfactory standby time of more than three days (original power, one or two days of power assembly); 2. Compared with the 83xx, 8 1xx models in the same period, the 8820 is worthy of being a king with solid workmanship; 3, wifi, GPS are all available ~ The screen display effect is perfect, even in the sun, it is absolutely clear. Of course, the resolution is average, but this is not the most important; As a business mobile phone, BlackBerry and its BlackBerry os system are totally incompetent. Whether it's shortcut keys or user-friendly settings, BlackBerry will implement the user-specific concept.

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.