Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
You call your carrier and ask for an unlock.

If that isn't free for you then I can't help you.

Software unlocks via jailbreaking died over five years ago.
 
  • Like
Reactions: Applejuiced
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.