Cause: Regional configuration changed in firmware (e.g., EU firmware disables DFS channels).
Solution:
If your OTA updates fail or you need to downgrade to an earlier version (e.g., to unlock band locking), manual flashing is the only option. Here is the safe method. huawei h122-373 firmware
The initialization process relies on U-Boot (Universal Bootloader). This low-level software initializes the hardware (DDR RAM, Ethernet PHYs) before handing control over to the Linux kernel. It also facilitates the firmware upgrade process via TFTP (Trivial File Transfer Protocol) or the Web UI during the pre-boot stage. Cause: Regional configuration changed in firmware (e