use it at your own risk

Samsung S,SII and SIII Network / Sim Unlock Code Generator
Samsung Galaxy S,SII and SIII Network / Sim Unlock Code Generator / Patcher Tool V 1.4

1st root your galaxy
2nd find nv_data.bin
3rd calculate code mannualy

Code:
  http://www.4shared.com/zip/IrwWFW4u/SamsungUnlocker_v14.html