Apple Pay Suica is different from Apple Pay credit cards in that Suica can only exist on a single device. Apple Pay credit cards can coexist simultaneously on iPhone, Apple Watch, not so with Suica.
To migrate Suica to a new iPhone or Apple Watch you must delete Suica from the old device first before setting up your new device. This is very easy to do:
- In Wallet delete Suica from the old device
- On the new device make sure you are signed in with the same Apple ID and set the device Region to Japan
- In Wallet add Suica on the new device as shown in the above video
- Once completed the device Region can be set to any user preference
Don’t worry about losing your Suica SF account balance or commuter pass information. Apple Pay iCloud and the Mobile Suica system preserve all of your Suica information, just make sure that you are signed in with the same Apple ID on your new iPhone and that Apple Pay is turned on.
If you wipe the old device, or forget to delete Suica on the old device before setting up the new one and cannot find your previous Suica, see Recover Suica from a lost or wiped iPhone. Other topics can be found on the Apple Pay Suica Guide