How to write drivers for the phone?

Users questions: Several mobile phones can not function, and want to re-program the phone to write, I ask my friends to what software and hardware? Whether to use some software to connect directly connected to the computer, write it into the program? I know nothing in mobile phones ah. In this special thanks to the enthusiastic friends! 7777 77, need the hardware Brush Brush JAF parts of the phone equipment data cable to the computer through the brush or write to update your phone is flashing
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