karen are you trying to set up the password using the internet? type in the browser 192.168.1.1 the password is admin, and the user name is the same, could be Admin, off the top of my head I can't remember. once in you can change the password.
I did look at a 2nd hand MiFi in the UK on 3network to see if it would work in Turkey, now you have one I guess I will not need it now.