Board Thread:Questions and Answers/@comment-30764928-20161221003043/@comment-5741122-20161221003806

Just make a data transfer code (you can do it in "Menu") and hold onto it until you get a new phone. When you get the new phone, download the game, then enter your code. Easy.

And when you make the code it will walk you through how to transfer as well. I did the same thing when I got a new phone.