You often need to dismantle the router and "short" two points on the motherboard (Test Point) to put it into Huawei USB COM 1.0 mode.
Ensure you have both the .bin (firmware) and often a .web (Web UI) file. Step-by-Step Overview (General Process) b311221 unlock firmware link
This often involves dismantling the device and short-circuiting two specific "test points" on the motherboard while powering it on. You often need to dismantle the router and
Many modem enthusiasts share the latest "bin" files in dedicated chat groups. b311221 unlock firmware link
Julian smiled. The firmware was installed. The chains were broken.