I think I'll be using the subway and buses a lot. I'd like to know if I can buy a card right at the airport or if I can recharge it at a convenience store.
With just one T-Money card, you can ride the subway, buses, and even taxis. You can buy it at convenience stores at the airport, and you can top it up with cash at convenience stores as well. Just remember to tap your card when you get off the bus to get the transfer discount.