Paying with Google Pay is fun and certainly won't be difficult for you. Below you will see a few steps that will allow you to master paying with a ZEN card using your phone.
Unlock your phone.
Hold your phone in the proximity of POS terminal for a few seconds.
A blue confirmation icon means you have successfully paid.
However, if after a few seconds there is still an issue with the transaction, try holding the phone in a different way and make sure that the NFC is working properly.