If you are using your own personal WIFI router you should be able to, but you would need to consult with the instructions or with the router manufacturer to be able to do that. If you are using a Suddenlink provided modem//router combination the password is permanent and the password can’t be changed. Although some models we use may allow you to log in and temporarily change the password inside the user interface, any loss in power or reset of the device will cause it to restore it back to its default settings and password.