Many USB-to-M.2 adapters have a "flash button" or a jumper for download mode.
Let’s clear up the biggest misconception first. is not a switch ASIC, nor is it a CPU. It is a G.984/G.988 compliant ONU (Optical Network Unit) SoC —primarily manufactured by Realtek (often found in their RTL960x family, rebadged for OEMs like ZTE, Huawei, and FiberHome). ml7820 b firmware
While specific tools vary, the general workflow follows these steps: Many USB-to-M
Download firmware only from trusted sources. Third-party or counterfeit firmware can permanently brick your module. rebadged for OEMs like ZTE