: If you're trying to reset your device, most ZTE devices can be reset by pressing a combination of buttons. For the F663NV3A, you might need to try:
To change settings or view the password, log in to the web interface (typically 192.168.1.1 or 192.168.0.1 in your browser). Common default credentials for this model include: superadmin supportadmin Administrator admin admin Standard User user User.321 password zte f663nv3a exclusive
button on the back of the modem for about 10–15 seconds while it is powered on. This will restore all settings to factory defaults , including the password. configure port forwarding once you are logged in? ZTE F663NV3A Login Credentials | PDF | Business - Scribd : If you're trying to reset your device,
If you enter the correct password but cannot connect, try changing the Wi-Fi channel from "Auto" to a fixed channel like 1, 6, or 11 to reduce interference. Summary of Credentials Account Type Super Admin superadmin suportadmin Standard Admin admin admin User/Client user User.321 Alternative User user user ZTE F663NV3A Login Credentials | PDF | Business - Scribd This will restore all settings to factory defaults
Even if the web portal is locked, the is often left open.
: If these defaults don't work, look for a physical sticker on the bottom or back of the router which often lists a unique default password.