Steps

1. Run “QFlash v5.1”.
   
2. Select the COM port number of “Quectel USB DM Port” (must use the USB port because serial port does not have “Quectel USB DM Port”).
   
   
3. Set Baud Rate to 460800.
   
4. Load Firmware Files.
   
   
5. Upgrade firmware.
   
   
6. Unplug the USB cable and plug it back. Use “AT+CMGR” or “ATI” to check the firmware version.
   

Download QFlash version 5.1

QFlash version 5.1 User’s Guide

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