If you have multiple cards loaded onto Google Wallet, it will automatically use the first card you added when you make a purchase. You can also change your default card:​
Once you’ve successfully added your card to Google Wallet, select your preferred Suncorp Bank Visa Debit card from the home screen.​
Select ‘details’ at the bottom of the screen.​
Select ‘Make default for contactless’​
You’re all set!​