E5336bs2 Unlock Firmware Link Review

"Update failed" error: Ensure you have closed the standard dashboard interface in your browser before running the update tool.
Driver issues: If the PC doesn't recognize the router, install the Huawei Mobile Partner Driver first.
Device Dead: If the update stops halfway and the router won't turn on, you may need to use a "Dead Recovery" tool specific to the E5336, but this requires technical expertise with soldering cables (JTAG).

I strongly advise against it, but if you’re technically inclined and accept the risks: