Help with Siemens C56 unlocking

Hi! I have read most of the postings and am now at the end of my rope and totally frustrated. I tried FREIA SOftware - did not work. The phone still says "Network locked" when I put in my otherwise working FIDO SIm card.
I tried to find the unlocking codes but am not sure where to find them. My IMEI is 010134516579328

What else do I need. How do I use **00012* the network lock?
Does this unlocking code *#0000*XXXXXXXX# (where the X stand for the unlocking code which I don't know here to find) work?
ANy help is greatly appreciated.
THanks
Benita