Connect your account to Google Play, Game Center, or Facebook to save the progress for your Exile. You will be able to access the same Exile across different devices even if you reinstall or update the game.
Tap on the avatar of your character.
Tap the button Google Play Games (Android), Game Center (iOS), or Login in Facebook.
Note: you can link only one Exile to the same Google Play or Game Center account. If you try connecting game to the Google Play or Game Center already associated with another Exile, you will lose your current achievements. The progress of the linked Exile will be downloaded instead.