I'm going to Japan (Tokyo, being more specific) on April, and I'd like to buy an iPhone there. I made some research and found mixed information about whether is possible to buy an unlocked iPhone 7 256GB in an Apple Store in Tokyo.
This post for example, is from someone that bought an iPhone and it didn't work in US. But MadDane said in Aug 18, 2016:
I have lived in Japan and have friends that came to visit while I was there that bought an iPhone 6s while there. This was at an Apple Store in Tokyo, but it was unlocked and works perfectly overseas. So you should definitely be able to get the same.
So, is it possible to buy an unlocked iPhone in Japan at an Apple Store to use it later with a GSM carrier in Brazil?