samsung T959 unlock succeed with the help of Z3x and odin software here is the procedure just download the appropriate firmware and also modem patch firmware from the z3x support site
1.Flash with tat file by using odin software
2.After tat flash the modem patch file by using z3x
3.unlock the mobile with the z3x using unlock sp tats all
Thx to rohit bahri
here is the screenshot