This is the safest method for standard firmware updates using a computer. Unlock B310 Router via LAN Update | PDF - Scribd

Authentic firmware can be sourced directly from Huawei Support by logging in with a verified account. Installation Methods

These files help fix software-related issues, IMEI problems, or "brick" conditions where the device fails to boot.

The firmware (typically distributed as a .zip or .bin file) is used to update, repair, or unlock the router for use with different network providers. Official and modified stock ROMs are available through various third-party repositories and support platforms to address software issues like bootloops or to enable universal SIM support. Huawei B310s-927 Firmware Overview