First, download the Google Pay app from the Google Play store. If your Tower card is already linked to your Google account, you can simply add it to the Google Pay app by confirming a few details. To add a new card:

1. Open the Google Pay app.
2. At the bottom, tap Payment.
3. At the bottom, tap + Payment Method and select Credit or Debit Card.
4. Enter the card information.
5. If you're asked to verify your payment method, choose an option from the list.
6. Find and enter the verification code, or allow your device to find it automatically