I bought a Monte Carlo today, and managed to unlock it just perfectly with the tutorials, but managed not to save the .qcn file. The phone boots up, accepts my T-Mobile SIM, and everything but wifi seems to work.
I have gone back and downloaded/saved the .qcn file, and edited with a hex editor and restored the file, but Settings>About Phone>Wiifi MAC still shows 11 22 33 etc. I repeated with arnoldziq's editor
and restored that file instead, but still the same.
What could I be doing wrong? I added the port in the QPST program and it detects the phone, it generates/downloads the qcn files, I am sure I'm editing the files correctly, and it looks like the files upload/restore correctly - the phone restarts yet the Wifi MAC doesn't change.