Most of them can be unlocked. I paid some random website to brute force unlock one for about $20. It took them about 6 days. Then they sent me a code, I entered

Most of them can be unlocked. I paid some random website to brute force unlock one for about $20. It took them about 6 days. Then they sent me a code, I entered it in a secret menu and then I was able to buy sim cards when travelling and it worked great.