[Android Devices]
In order to use your other device with the same account you must be logged into the same Google Play account on both devices. Please try this and let us know how it goes.
In order to use your other device with the same account you must be logged into the same Google Play account on both devices. Please try this and let us know how it goes.
[IOS Devices]
To use another iOS device with the same account you must be logged into the same iCloud account on both devices. Please try this and let us know how it goes.
[Playing on another device using the same account]