Perform a factory reset ( Management > Factory Defaults ). This clears old configuration fragments. Then, restore your backup or manually reconfigure your PPPoE and Wi-Fi settings.
After reboot, log back in and go to Device Info to confirm the new software version. zxhn h298a firmware
A: Try the Wayback Machine on your ISP’s support page or contact their technical escalation team. Perform a factory reset ( Management > Factory Defaults )