ZTE routers, like many other networking devices, come with a default username and password. These credentials are used to access the router's web interface, where you can configure settings, manage connected devices, and troubleshoot issues. If you've never changed these defaults, you'll need to know them to log in and make changes.

admin Default Password: admin

Since ZTE routers are provided by many different Internet Service Providers (ISPs) around the world (like AT&T, T-Mobile, Optus, Telstra, Movistar, etc.), the credentials can vary.