Yes, to use a Truly Roaming eSIM in Seoul, your smartphone must be unlocked by your home carrier. While most modern phones support eSIM technology, an unlocked device is crucial for it to accept and operate with a new network profile from Truly Roaming. Always verify your phone's compatibility and unlock status beforehand to ensure a seamless setup process and immediate connectivity upon arrival, crucial for digital nomads needing reliable data from day one.
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Does my phone need to be unlocked to use a Truly Roaming eSIM in Seoul?
Updated July 22, 2026
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