I suggest you can approach http://www.mobileunlocksolutions.com/samsung-galaxy-s3/rs1wp9/ and specify the country,locked network of your Samsung Galaxy S3.Based on the availability you can get the unlock code along with free instructions.
I suggest you can approach http://www.mobileunlocksolutions.com/samsung-galaxy-s3/rs1wp9/ and specify the country,locked network of your Samsung Galaxy S3.Based on the availability you can get the unlock code along with free instructions.