Huawei: B310s-518 Firmware !link!

Wrong firmware can brick the device.

Mastering Your Huawei B310s-518: A Complete Firmware Guide Huawei B310s-518 huawei b310s-518 firmware

The file size is typically between 25 MB and 35 MB. If you download a 1 MB file, it is likely a web installer or a fake. Wrong firmware can brick the device