Please let me know about "Transferring Boost Mode During the Validity Period".
If you transfer your play data during the Boost Mode validity period, you can receive boost effects on your new device.
*If you transfer your play data to a device with a different OS, you cannot transfer Boost Mode.
*Please cancel your existing subscription in advance and purchase Boost Mode on your new device.
*If you don’t cancel your existing subscription, it will continue as registered on your previous device.