Korea eSIM, SIM Card & Global eSIM FAQ

Korea eSIM

Before Purchase

Products

1. Why Is SKT Korea eSIM So Popular Among Foreign Visitors?

2. Why Do Overseas Koreans Need a KT Korea eSIM for Data and Voice Calls?

3. What are the Differences Between SKT, KT, and LG U+ eSIMs?

Device Compatibility

1. How can I check if my device supports eSIM?

2. How can I check if my phone has a country lock?

Speeds

1. Which Is Better for Traveling in Korea: LTE or 5G?

2. What is 5G & LTE speed in Korea?

3. Is 5 Mbps Internet fast enough for enjoying Netflix, Youtube or Gaming?

Installation

iPhone

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How do I install a Korea eSIM on an iPhone?

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How do I manually install an eSIM on an iPhone?

Android

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How do I install a Korea eSIM on an Android phone?

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How do I manually install an eSIM on an Android phone?

Notes

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How do I rename (label) an eSIM on iPhone and Android?

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This eSIM installation applies to local eSIMs in Vietnam, Japan, and Thailand.

Usage Guide

SKT

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How do I verify my passport to activate voice calls on my eSIM?

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How do I top up my SKT eSIM for voice calls?

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How do I check my SKT eSIM balance and usage?

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Can I continue using my eSIM if I leave and re-enter Korea?

Yes. Voice service resumes after passport re-verification upon re-entry.

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How can I top up my KT eSIM for voice calls?

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How do I check my KT eSIM balance and usage?

Trouble Shooting

Setup

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Why is my Korea eSIM not working after installation?

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Why Does My New SKT Korea eSIM Not Work Even After Deleting the Previous One?

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Why Do Activation errors occur when activating a New Korea eSIM while another eSIM is alive?

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How do I fix iMessage after installing a Korea eSIM?

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Why is my eSIM not working even when both lines are turned on?

International eSIM

Installation

Setup

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How do I install a China eSIM on an iPhone?

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How do I install a China eSIM on an android phone?

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eSIMs are available not only in China (China Unicom) but also
in Korea (5G-Data SKT), Asia (18-country), and Europe (28-country)