Unlocked phone was locked
Hello. I bought a new sealed factory unlocked phone.
My mistake that I activated it using AT&T sim card.
It became locked! I can't use it with my country sim card or any US-sim (T-Mobile and so on).
I checked it twice.
I tried to reset the phone and reactive...
I'm not resident of US. I'm just a tourist.
I will go home at 1 April.
I tried to unlock it on site, but got:
"Looks like the device you want to unlock is active on another AT&T account. The owner has to remove it from their account first. Did we get that wrong? If you're the owner, call 800.331.0500 or 611 from your mobile phone to confirm."
How to unlock it before I will go home?
P S I have AT&T prepaid SIM card, but I can close it if you need.