This blew my mind when I first learned about it! However there are some big limitations to when it’ll work… the tech is there but since 2018 restrictions have been put on use cases because of things like Face ID for extra verification. This feature relies on a special chip inside your phone called the secure element. It can store just enough power from NFC terminals to let you use stored passes but with some big limitations: iPhones: Since the iPhone XS (2018), Apple allows only your default transit card (like in Apple Wallet for subways/buses) to work when the phone is dead. You can’t buy coffee or pay at a store this way it’s strictly for transportation. Android phones: Some models support a similar feature, but it depends on the manufacturer and whether they’ve enabled it. Like iPhones, it’s mostly limited to transit cards, not general payments. Why? Authentication. Normally, Face ID, Touch ID, or your passcode verifies you. With the phone off, that’s not possible so Apple and ...