Log into the router (usually 192.168.0.1 or 192.168.1.1 ), go to Management > Backup/Restore , and save your configuration file. A hard reset after update is common, so this saves your WiFi names and passwords.
By using a wired Ethernet connection, matching the exact firmware version to the MF286R model, and performing a factory reset afterward, you can successfully update your router to enjoy faster speeds, improved band locking capabilities, and a more secure network environment. zte mf286r firmware update work