Samsung Pay uses your Samsung device to make contactless transactions, so you don't need a contactless enabled debit or credit card to use the service.
Contactless payments using an enabled debit or credit card are subject to a limit per transaction, which is currently set at up to £30 in the UK.
Samsung Pay contactless transactions using your Samsung device have no such limit. This is because you authorise Samsung Pay payments over £30 using the fingerprint sensor, your PIN, password or pattern or your iris, increasing the security over standard contactless transactions. However, merchants may have a limit set on their terminal, and you must have the available balance and credit limit to make the payment.