Zte MF612 User Manual page 18

User name: admin
Password: admin
Click Login to log in the router.
Note: If you check Save after you give user name and password ,the
router will save them, next time when you want to log in the router with
the same user name and password, what you need to do is click Login.
When you successfully login, the Quick Setup procedure is shown in
the following figure:
Internet Access
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