help! my M8 didn't ask me about the unlock code topic

I try to unlock my Sprint M8,I tried T-mobile and AT&T sim card.
But my phone didn't likes youtube video, My phone didn't ask me about the unlock code. It just simply tell me the sim card is Invalid.
I have tried to use the unlock helper to unlock it, but it just unlock the internation lock.
I still want to unlock the domestic carrier lock.

Is it the ROM problem?
My phone use the Android 4.4.3,and it is S-OFF.

Please help me!