@Sunshine Finally I change firmware to OpenWrt and problem solved. Now working perfectly. Regards Vipin

@Sunshine Dongle is 4G quectel EC200N . I am from embedded linux background. As per my obervestion of log. Device detect on usb but don't create dev/ttty node because of not valid vid and pid. If vid...

How I can add new device VID:0x27c7, PID: 0x6002 QUECTEL 4G This is standard usbserial device. Can I create configuration file ? Regards Vipin