Huawei B311221 Firmware [top] Download Link -

If your router is unresponsive or you need to flash a specific version, several third-party repositories host official stock files. Ensure the version (e.g., H187SP... ) matches your region to avoid bricking. HUAWEI Global How do I update the firmware version of my HUAWEI router

I will not paste direct links here, but searching for "B311-221 firmware 11.173.01.01.172" may lead to community mirrors. huawei b311221 firmware download link

Before you start: