You can use your Injustice 2 Mobile game save across multiple devices as long as they are on the same platform. At this time, it is not possible to transfer a save between platforms (Android <-> iOS).
If you would like to use your save across multiple devices on the same platform (i.e. iOS or Android), first make sure both devices are logged into the same iOS Game Center or Android Google Play account via the Settings menu on your device.
Normally the game will retrieve your existing save on any new devices if it sees that you are connecting with a Game Center or Google Play account that you have already used with the game before.
If this doesn’t happen automatically for you, please follow the steps below carefully to make sure you do not lose your game save:
Start Injustice 2 on both devices that you would like to play on
Open the Settings Menu in-game
If both accounts are on the same Game Center/Google Play account, but aren’t using the same save data, you will see one Settings menu with an “Unlink from Game Center/Google Play” button, and the other with a “Connect to Game Center/Google Play” button.
The game save with an “Unlink” button is the one that currently has a Cloud save.
The game save with a “Connect” button is the one that is currently only saved locally on your device.
Determine which game save you want to use by looking at your save data/collection on both devices before moving forward.
If the game save you want to use shows an “Unlink” button, it is already linked to the cloud. You can simply press the “Connect to Game Center/ Google Play” button on your second device and you will be prompted to download your Cloud Save. Selecting "Accept" will replace the locale save on that device with the Cloud Save that is linked to Game Center / Google Play.*
If the game save you want to use shows a “Connect” button, you will need to use the “Unlink” button on your second device with the unwanted save in order to disconnect the Cloud Save
If the “Unlink” button does not work, try restarting the game on your device After you have “Unlinked” your unwanted save, try pressing the “Connect to Game Center / Google Play” button on your device with the save you want to keep.
This should connect normally if no game save is already associated with the Cloud
Once your game save is connected to the Cloud, as indicated by the “Connect” button disappearing and being replaced with an “Unlink” button, you can then retrieve your Cloud Save on your second device by pressing the “Connect to Game Center / Google Play” button on it.
Selecting "Accept" on your second device will replace the locale save on that device with the Cloud Save that is linked to Game Center / Google Play, which should be the game save you wanted to keep if you followed the instructions above.*
*Important Note: If selecting "Accept" on the prompt shown in the image above causes your game to crash, try starting your game again. If it starts up and still has the "wrong" game save, you can simply delete and reinstall the game on the device. Since your "correct" game save is already linked to the Cloud if you have followed the steps above, when the game starts up after you reinstall it, it should automatically retrieve your cloud this time.
If you experience any difficulty with this process, please contact Customer Support!