Consider ordering an RFID card from charger providers

Chargefox and Evie offer RFID cards, so as well as loading their apps, I ordered a card, just in case I had to use a charger where mobile signal was out (perhaps in underground carparks, or during an outage). I actually find myself using the card instead of the App to start / stop /pay for the session most of the time. It's quick and convenient.