If you are the owner of the Samsung Galaxy Note 2, 2, S4 or the S3 and you want to unlock the handset there is good news as there is a leaked code to unlock the handset.
One of the reasons why people buy a locked handset is that it comes in cheaper thanks to subsidies. When the contract runs out they then have to unlock it so that they can take the device to a different carrier. Now thanks to the leaked unlock code owners can unlock their handset easy.
So if you are the owner of the Samsung Galaxy Note 3, 2, S4 or the S3 you may want to check out the steps listed below to free your handset from the carriers bonds.
One: Insert a new SIM card into your Galaxy Note 2 or Galaxy S4.
Two: Turn off your device then turn it back on again.
Three: Head to the dialpad and enter in *#197328640#.
Four: Choose  UMTS >  Debug Screen >  Phone Control >  Network Lock > Options  Perso SHA256 OFF.
Five: Wait for 30 seconds or so before heading back into the main menu by choosing “back”.
Six: In your main menu, you’ll see “Network Lock”, so now choose  NW Lock NV Data INITIALLIZ
The unlock code has been said to work with many other handsets belonging to Samsung, along with the Samsung Galaxy Note 3, 2, S4 and S3.