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?

Installation

iPhone

–

How do I install a Korea eSIM on an iPhone?

–

How do I manually install an eSIM on an iPhone?

Android

–

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

–

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

Notes

–

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

–

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

Usage Guide

SKT

–

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

–

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

–

How do I check my SKT eSIM balance and usage?

–

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

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

–

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

–

How do I check my KT eSIM balance and usage?

Trouble Shooting

Setup

–

Why is my Korea eSIM not working after installation?

–

Why does my new SKT Korea eSIM not work after the previous one has expired?

–

How do I fix iMessage after installing a Korea eSIM?

–

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

International eSIM

Installation

Setup

–

How do I install a China eSIM on an iPhone?

–

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

–

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