Huawei releases updates in waves. If your device is carrier-branded, you must wait for the carrier to approve the release, which can take months.
If you have a second H122-373 with the firmware you want, you can use a serial console (TTL) or backup scripts available on GitHub to dump the flash. This is highly technical and not recommended for beginners.
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Not all firmware is created equal. Based on thousands of user reports across forums (Reddit, 4pda, XDA Developers), here is a consensus:
Huawei does not typically provide direct "click-to-download" firmware files on its public consumer website. Instead, you must use these methods: Access the web interface (usually 192.168.8.1 ). Navigate to Advanced > Update > Check for Updates .