Board Thread:Game Discussions/@comment-83.23.113.28-20170716011112/@comment-27862737-20170716185449

From what I have seen so far, I believe it's when you have the game open and start it up that determines what server you get (your geographical location). I had an Email account created in the US, but was able to use it for an EU account that someone else created for me (they just linked the two), so I think it has more to do with the app on your device and where you physically are when you start a new game.