4gdong001 Firmware -

dd if=/dev/ttyUSB0 of=backup_4gdong001_old.bin

Alternatively, I can show you how to check the firmware version via AT commands. 4gdong001 Firmware

Capable of acting as both a USB modem (dongle mode) and a WiFi hotspot simultaneously. Firmware Management and Flashing dd if=/dev/ttyUSB0 of=backup_4gdong001_old