Hi is your samsung phone locked to network provider ..Then you can easily unlock it using network unlock code ..You can purchase that code from online providers like Unlock-Zone.com here they render unlock code for all mobile models at reliable cost ..You first check that whether they are rendering code for your mobile model ,country and network provider .If yes then pay for it and unlock your samsung phone ..Else if your samsung phone is locked to security code then try default code to reset your phone .