This one is city specific but if your cities public transport supports express pay then going through gates would be so seamless, just enable express pay and bring your phone near reader and boom paid
I use this feature with my apple watch though makes it easier but iPhone has similar functionality
I am in Sydney in case other sydneysiders reading this and have not enabled express pay yet
I am legally blind and I hold my phone very close to face even though I have glass I can’t read unless it’s very close to my face so this warning would mean I won’t be able to use my phone at all lol thankfully it’s not on by default