: If the interface says the software is up to date and no new version is found, it means the latest update for your specific region or ISP has already been applied.
: Upgrading the software typically saves your current Wi-Fi name, password, and broadband account settings. No Rollbacks
You cannot proceed without knowing what is currently installed. Here is how to check your software version on the Huawei HG255s:
Connect your PC to the router (via Ethernet or Wi-Fi) and navigate to 192.168.1.1