Zte F6640 - Password

If you changed your password and forgot it, or if the default credentials on the sticker do not work, you must perform a hard factory reset. A factory reset wipes all custom configurations, including custom Wi-Fi names, passwords, and port rules, returning the device to its original out-of-the-box state. How to Hard Reset the ZTE F6640: Keep the router powered .

The default login credentials for ZTE F660/F6640 routers are: zte f6640 password

SupAdmin | Password: AdminSup3031 (often used by providers to lock admin features) Username: root | Password: root Finding Your Unique Password If you changed your password and forgot it,

Navigate to the or Administration tab in the top/side menu. Select User Management or Device Management . Choose the user account (e.g., admin ). Enter your Old Password . The default login credentials for ZTE F660/F6640 routers

If you've forgotten the admin password, you can reset the router to its factory settings:

Ensure Caps Lock is turned off. Passwords are case-sensitive.