How to unlock the country lock on unpaid phone

AT&T is policy has never allowed phones to be unlocked until they were paid off unless you are active military 19 years old. I assume you are not or you would have led with that.  

If you didn't purchase your phone under some sort of promotion, just pay it off. Then you can unlock it. But it may take a few days. 

Or, purchase a cheap phone for local service, or pay for roaming.

they are strict on the unlocking they wont just waive the requirements because you have an urgent matter in your eyes

bottom line they wont unlock it until  its paid off, also keep in mind if paid off early there entire account will lose all the promotions 

You can certainly call the international support number and ask but I’ve never heard of ATT unlocking a phone not yet paid off.

I bought a phone via ebay, I'm in Brazil and I called apple they told me it's blocked by At&t I need to unlock it, but I can't issue the bill to pay can anyone help me?

@Eduardo2311 No, no one can help you. ATT won’t unlock the phone if not paid off but only the original owner can pay it off. You can not pay it off. That is the risk of buying phones second hand. Return the phone and get your money back, if possible.

@sandblaster Am I willing to pay for At&t not to generate this tab?

You can’t pay At&t to unlock the phone. You were scammed and ripped off get a refund.