my phone sim card is locked

[AC Question]

help me unlock it for free

 

[STARGATE]

It's hard without knowing what phone and carrier.
You'll better off by asking your carrier to unlock it. They should do it.

 

[Rukbat]

If you mean that your phone is SIM locked, your carrier can give you the unlock code (it could take a week for them to get it). SIM cards themselves can't be locked.