小灵通软件工厂升级程序，里面包括串口的图形界面和简单的文件管理。-This is a firmware upgrade software for PHS mobile phone, and it include the UART s setting and files management.

用VB制作界面，完成手机与电脑串口通信功能，源代码完整，可直接运行工作-VB produced interface, complete the mobile phone and computer serial communication functions, complete source code can be run directly work