__exclusive__: Ml7820 B Firmware

AT+CGMR Firmware version string. Example: M7820B_V1.2.3

Write down the full version string. It often includes a date code or build number, e.g., M7820B_21.005.00.00 . Method 2: Using Fibocom’s Windows GUI Tool Fibocom provides a proprietary tool called Fibocom Download Tool (sometimes named FIBOCOM_DL_Tool ). When connected, it automatically reads the firmware version from the module. Method 3: Linux Kernel Logs On a Linux-based router (e.g., OpenWrt, DD-WRT, or Yocto), check dmesg or lsusb -v : ml7820 b firmware

AT+CGMM Model confirmation: M7820B