Unlock your Samsung Galaxy S3, Note 2 and Ruby. Free. No Rooting. No Hacking.
You MUST have Android 4.1.1 for this to work, otherwize the last step NW LOCK NV… will be missing.
Just dial the following keys *#197328640#
 Debug Screen
 Phone Control
 Network Lock
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