The updated Samsung Pay app allows users to set a default payment card to tap on and off Opal terminals with their phone while still locked.
Australians will be among the first to have access to this feature.
“Samsung is investing in delivering cutting-edge solutions for Samsung Pay to help provide customers with maximum convenience and security for their mobile wallet," said head of Samsung Pay in Australia Mark Hodgson.
“We worked with Transport for NSW to build a solution that is designed to offer a seamless experience for people choosing to use Samsung Pay when commuting across the NSW Opal network.
“We pride ourselves on working with organisations to help create convenient solutions for customers, and we are constantly on the lookout for new opportunities to make this happen."
With the updated app, people will be able to use Samsung phones with any Opal terminal that accepts credit or debit cards. That includes Sydney Trains, NSW TrainLink Intercity rail services, light rail and Sydney Ferries services, but not buses (yet).
Contactless fares are charged at the peak adult Opal fare for the trip.
Contactless payments — including those made with a phone or other device that's connected to a credit card — have been available for certain Opal trips for around a year, following an earlier trial on the Manly-Circular Quay ferry.
Public Transport Victoria recently introduced a digital myki card that works with Google Pay, but not Apple Pay.