Download the Google Pay app from the Google Play Store.
In the Google Pay app, go to the Payment tab and tap Add Payment Method. Follow the simple instructions to add your Neo Mastercard®.
How do I pay with your Neo Mastercard using Google Pay?
To pay with your Neo Mastercard using Google Pay, simply unlock your device and hold your phone near the card reader.
Note: Some countries have bans/blocks on Mastercard. You can do a quick google search to find countries that don't accept Mastercards.