Engadget
Common problems with Google Wallet and how to fix them

Google Wallet users often face contactless payment failures when NFC is disabled, a case blocks the antenna, or a card hasn’t finished its setup process. To resolve this, enable NFC in phone settings, ensure the card is fully verified and eligible with the bank, and remove metal or thick cases that interfere with the reader. If a payment still fails, consult Google’s troubleshooting guide or contact the bank for additional verification.