Do not install firmware meant for a different hardware revision. 2. Sourcing the Firmware ISP-Locked

| Issue | Solution | |-------|----------| | Upload fails | Check file name (no spaces/special chars). Re-download firmware. | | Router doesn’t reboot | Wait 10 minutes, then power cycle manually. | | Can’t log in after update | Use default credentials (admin/admin). | | Update not showing | Clear browser cache or try another browser (Chrome/Firefox). |

: Select Manage Updates (or a similar "Maintenance" or "System" option).

Upload the downloaded .bin or .zip file through the > Software Upgrade section of your router’s web interface. Important Tips

Before updating the software in your HUAWEI HG255s router, make sure:

Never update via Wi-Fi. A signal drop can "brick" the router.