Apple Wallet stores credit cards, transit passes, tickets, and more, but issues can arise. A common problem is Apple Pay cards randomly failing with messages like "service unavailable" or "payment declined." This often happens when a card expires or is reissued and Wallet hasn't updated. The primary fix is removing the card and adding it back: open the Wallet app, select the card, tap the three-dot button, choose Card Details, then Remove Card. Re-add it via the Plus (+) button, which may require bank verification. If a card never worked, confirm your bank supports Apple Pay.

Outdated software can also cause problems. Update your iPhone via Settings > General > Software Update. Region settings affect Apple Pay and Apple Cash availability; check Settings > General > Language & Region to ensure the correct region. Apple provides a support page listing supported regions and banks.

If issues persist, ensure Face ID or Touch ID is enabled with Contactless & Payments turned on under Settings > Face ID & Passcode. Two-factor authentication on your Apple Account is also required. Not all tickets are compatible with Wallet, but iOS 27 now includes built-in pass generation from QR codes. Restart your device and check Apple's System Status page for outages affecting iCloud or Wallet services.