If your card comes with EZ-Link/NETS FlashPay functionality, please proceed to the nearest General Ticketing Machine (GTM) located at any train station to switch the payment mode of your card to contactless payment by placing it on the card reader and following the onscreen prompts. Your card can be used to pay for bus and train rides immediately after switching the payment mode.
How am I supposed to know if my card comes with that functionality? If I have to go to the GTM machine to handle the linkage, why ask me to register the card in the app and give me the impression that it was ready to be used.