ZTE MF75 - Manual (Page 15)

5. Select your profile from the Profile drop-down menu and then
click Apply.
6. You can also customise your Wi-Fi SSID and password in the
Settings tab. Just select Wi-Fi settings, make your changes and
then click Apply.
7. You’ll need to connect your devices to the MobiiConnect 4G
Wi-Fi again using your new SSID and/or password.
For more information about the Web Management page, please
search for “mobiiconnect” in the Support section of our website.