Sign up for Samsung Pay by opening the app on your new device and following the onscreen instructions. Then, enroll in Samsung Rewards. You do not need to register a credit or debit card to sign up for Samsung Pay.
This makes me think you have to have a new Samsung pay/rewards account. Is this the case or can you redeem the offer with an existing Samsung pay/rewards account?
This is a great question. I checked out the terms for the offer and didn't see anything specific saying you couldn't use an existing rewards account. You can reach out to Samsung directly to see if this is a requirement.