Skytrain passengers no longer need to queue up to buy tickets, add value or top up fares at the counter, as all those tasks can now be done via smartphone.

Rabbit Line Pay, Rabbit Card and skytrain operator BTS on Tuesday held a soft launch for fare payment via Rabbit Line Pay with a new BTS icon in the Line app.

Through their smartphones, passengers can register for the service, add stored value, buy trips, check outstanding stored value and review their trip history.

Passengers can deduct fares from Rabbit Line Pay's e-wallet or from a credit or debit card tied to Rabbit Line Pay.

The service includes notifications before fare deduction and when trips are bought via Line, as well as when outstanding stored value is less than the fare.

Losing a Rabbit card will not mean losing money, as users can remove the lost or stolen card via mobile immediately and protect the remaining value or trips on the phone.

Passengers can register for the full launch of the service in the first quarter of 2019, including Bangkok Bank's co-branded card.

Mr Lee said more than one Rabbit Card can be bound to Rabbit Line Pay to satisfy family users.

Ratchanee Saensinchai, managing director of Bangkok Smartcard System Co Ltd, said Rabbit Card was launched in 2012 as a BTS ticket.

Today more than 10 million cards have been in use, Ms Ratchanee said, and the card is also accepted as a payment choice at shops.

Globally, Line Pay is available in four countries: Japan, Taiwan, Thailand and Indonesia.