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I bought an original BlackBerry 8700 of 14 on Taobao. See the supplement! You can play!
BB, check it when you get it.

Whether there are obvious traces of dirt blockage in the data port, charging port and other parts,

In addition, be sure to open the back cover to see if the metal plate at the interface of circuit board, battery slot and SIM card slot is worn and aging.

Another good way is that there is a Bluetooth address number on the circuit board, write it down, then open the phone to enter the menu, and start Bluetooth in the options in the menu to quit viewing the phone. If the figures match, it must be made by a foreign original factory, but the credit of the general monkey shop is very good and guaranteed. The 500 bought by Yuan You should be a second mobile phone, but the quality problem in BlackBerry is not big!

Regarding the crash, it is suggested to refresh the computer and brush the ROM version 4.2, which can solve the crash problem well.

This is generally not the case if the keyboard is loose. If you have, you can watch videos online, soak in forums and learn how to disassemble and clean up BB.

You have to learn more to play blackberry.

I hope the above can help you ~