Option 1: eSIM
An eSIM can be convenient because you can activate a compatible plan without changing a physical SIM.
Option 2: Physical SIM
A Korean SIM can be useful if your phone supports it and you prefer a physical card.
Option 3: Wi-Fi
Portable Wi-Fi can work well for groups sharing one connection, but it means carrying another device.
Simple choice: For many travelers with a compatible unlocked phone, an eSIM is the easiest option.
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