- From the main screen, select the hamburger menu and then select "Payment Methods".
- In order to change your default card, first, make note of what is currently your default card. Next, touch the card you want to switch it to.
- When the dialog is prompted to switch your card, simply select "Yes".
- And boom. Easy peasy, your other card has now been set as the default payment method.
Just a note that, if there is only 1 card on your profile, it must be set as the default card. If you wish to deactivate it, you may only do so by deleting it from your profile entirely.