Yesterday I shared my fifa15 apk and sd data with a friend. He installed the game and because he had a slow data connection, he used my Data connection through Wifi hotspot. Now the problem is, as he signed in into Google Play Games, the game is displaying my Gamer ID and syncing my Fifa15 progress on his phone on his google play games app. In simpler words, we are using a common Google Gamer ID only for Fifa15. I haven't checked what's the case in other games but I think there shouldn't be a problem in other games. I need to know if there's a way to unlink my Gamer ID from his phone. His google play games is still using his email ID to Login into Google play games. Just this gamer ID and Fifa15 progress syncing is the problem here. Some help ? Thanks in advance!