How to Access Admin for Blank WAN Mac Wimax

I have a  Blank WAN and  I cannot generate a password for admin.
I cannot access Telnet too

I can only log in in user:user

This is  what a Blank WAN looks like.. first load in null

Then  I log out
first log in as  admin with guest password.

 Remove the highlighted  word .. remain  192.168.1.1/html/login.cgi?Username=admin&Password
Press Enter  and you have log in as admin

I upload  my working configs then I restore default and try to change mac .Telnet is accesible  still no luck .. I cannot turn back my WAN MAC.

 I guest the only solution is to flash but  I want to find solution on just a telnet  command  or any firmware update without jtag  the modem (flashing).