Never disconnect the power supply during an update. Doing so can "brick" the device, making it unusable.
The easiest way to update is directly through the router's web management interface. This method ensures you get the official, compatible version directly from Huawei's servers.
If you need to update a router that doesn't have internet access, you can download the firmware package from a separate device.
There are two primary ways to ensure your router is running the latest software version: the method (recommended for most users) and the Manual Update method. 1. Online Update (Automated)
Some users source files from sites like GSM Firmware for specific regional versions, though official channels are always safer.