SIM cards, Wi-Fi, and paying in Korea

Two things make a Korea trip smooth: data and a transit card.

Getting data - Tourist SIM or eSIM: buy online before you fly or at the airport - Portable Wi-Fi: good if several people share

Paying Cards are widely accepted, but keep some cash for markets and small eateries. A T-money card covers buses, subway, and many convenience stores.

Handy apps - Maps that work well in Korea (local map apps beat the global ones) - A translation app with camera mode for menus