**FREE UNLOCK** For Samsung Galaxy S3 and Note 2 - ALL GSM
=====ALL Credits to Owl74 on XDA-Developers=====
Please DO NOT profit off someone elses' idea on ebay or craigslist.
To unlock your Galaxy S3 OR NOTE 2:
Just dial the following keys *#197328640#
Main Menu >  UMTS >  Debug Screen >  Phone Control >  Network Lock > Options Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in  Network Lock then choose  NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone... enjoy!!!
standard disclaimer: I am not responsible if you don't follow directions and what you do with your phone...
By doing this procedure, you do so AT YOUR OWN RISK