network unlock

[Unregistered]

I have a galaxy s5 on us cellular and I've tried everything under the sun to get the stupid thing unlocked .it has been rooted the region lock has been removed and I even have the unlock code us cellular and I can't get the secret menu to appear and no matter what code I enter into the dialer it doesn't respond to any of them. I am about to give the dam thing flying lessons. All I want to do is use it with straight.talk any solutions please email me at [email removed by Moderator] thank you