QT系统使用4G上网

操作步骤 1、生成ttyUSB节点 QT_6818\kernel\drivers\usb\serial  option.c static const struct usb_device_id option_ids[] = { //added by rpdzkj ivy for 3G 2015.11.6 { USB_DEVICE(0x05C6, 0x9090) },  //for UC15     

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