How do I keep track of player purchases if they get a new phone?

Thanks for the response! I’ve actually reviewed that documentation. Let me throw a scenario at you:
Let’s say that I have an in-game currency pack for sale for $1.99. I know that the currency pack would be labeled as a consumable. The currency is then used to unlock different skins. The skins are NOT directly purchasable with real money. That’s the real question that I could have been more clear about. Is it possible to have a “free” in-app unlockable tied to Google Play as an IAP? I hope that made sense.