how to unlocked my sim pin code?

[Android Central Question]

i,ve htc m8 gold cell, i know my sim pin unlocked code, but i,m enable to unlock my sim pin code?
message appear u enters wrong pin code?what should i do?

 

[Rukbat]

Did you get the code from the SIM card (the big card that the smaller SIM card came from)? Or from your carrier? Or is this a PIN you put in yourself to lock the SIM?