ZTE AW3632 is asking for password.
You will have to check the manual of the ZTE device, because I couldn't find anything related to password protection. The manual should be on the CD that arrived with your device or the actual leaflet. There is no other information about the modem except this one.
If you are using windows,connect your device on your pc,when you enter the internet,you will see the zte setup page,type admin for username and password.Then,you can find the password of your router.
I hope this is helpful.