Is roaming included or free in South Korea if I'm using a European (EU) or US SIM card?

This is a common misconception and a potential trap for travelers! South Korea is not part of the EU, nor is it typically included in 'free roaming' zones for most European or US carriers. Your 'Roam Like at Home' benefits from an EU SIM will definitely not apply here. Similarly, US plans often charge exorbitant daily fees or per-MB rates for international roaming in countries like South Korea. With EastESIM, you get transparent, affordable data access through reliable local networks like SK Telecom or KT, saving you from unexpected and costly roaming charges while exploring Seoul or Busan.