- Home
- Destinations
- China, Japan & South Korea eSIM
China, Japan & South Korea eSIM
A 5 GB China, Japan & South Korea eSIM costs £16.99 for 30 days across 3 countries with 5G. Plans start at £3.99 for 500 MB a day. Delivered by email in seconds.
China, Japan and South Korea make one busy, brilliant loop, and this eSIM is built for exactly that mix. Shanghai, Tokyo and Seoul can all sit on one trip, so you buy once and skip a SIM swap at every airport.
- 5G and 4G
- 3 countries on one eSIM
- Top up anytime
- Instant email delivery
Your China, Japan & South Korea eSIM in two questions
Which China, Japan & South Korea eSIM plan fits your trip?
Three countries, one trip, and a plan that matches your days and your habits.
- A three-day hop: fly from Incheon to Narita for a quick Seoul and Tokyo break, using maps and messages only. 1 GB for 7 days suits that. If you're only in Japan, Japan's own eSIM is the simpler pick.
- A week in Osaka and Seoul: standard use, with social media, music and some video, fits 5 GB for 30 days. Land at Kansai (KIX), then use GO for rides in Japan and Kakao T in South Korea.
- Two weeks in Tokyo, Busan and Gyeongju: streaming and hotspot use across two countries calls for 2 GB a day for 15 days.
- A month across all three: Shanghai, Tokyo and Seoul with standard use fits 20 GB for 30 days. In China, Google services are blocked, so set up your apps, including WeChat, before you land.
All 27 China, Japan & South Korea eSIM plans
Prices include any taxes. Price per GB shown so you can compare at a glance.
| Data | Valid for | Price | Per GB | Top-up | Buy |
|---|---|---|---|---|---|
| 1 GB · 7 days | £4.99 / €5.99 / $5.99 | £4.99 / €5.99 / $5.99 | Choose | ||
| 3 GB · 15 days | £10.99 / €12.99 / $13.99 | £3.66 / €4.33 / $4.66 | Choose | ||
| 3 GB · 30 days | £10.99 / €13.99 / $14.99 | £3.66 / €4.66 / $5.00 | Choose | ||
| 5 GB · 30 days | £16.99 / €19.99 / $21.99 | £3.40 / €4.00 / $4.40 | Choose | ||
| 10 GB · 30 days | £27.99 / €33.99 / $36.99 | £2.80 / €3.40 / $3.70 | Choose | ||
| 20 GB · 30 days | £45.99 / €54.99 / $59.99 | £2.30 / €2.75 / $3.00 | Choose |
| Per day | 1 day | 3 days | 5 days | 7 days | 10 days | 15 days | 30 days |
|---|---|---|---|---|---|---|---|
| 500 MB a day | £3.99 / €4.99 / $4.99 | £6.99 / €8.99 / $8.99 | £9.99 / €11.49 / $12.99 | £9.99 / €11.49 / $12.99 | £9.99 / €11.49 / $12.99 | £13.99 / €16.49 / $17.99 | £27.49 / €32.49 / $35.49 |
| 1 GB a day | £4.99 / €5.99 / $5.99 | £12.99 / €14.99 / $15.99 | £16.99 / €19.99 / $21.99 | £16.99 / €19.99 / $21.99 | £16.99 / €19.99 / $21.99 | £24.99 / €29.99 / $32.49 | £49.49 / €59.49 / $64.49 |
| 2 GB a day | £8.99 / €9.99 / $10.99 | £23.99 / €28.99 / $30.99 | £32.49 / €38.99 / $41.99 | £32.49 / €38.99 / $41.99 | £32.49 / €38.99 / $41.99 | £48.49 / €57.99 / $62.99 | £96.49 / €115.49 / $125.49 |
3 countries on one eSIM
Cross borders without changing anything: your eSIM switches to the local network in each country by itself.
| Country | Networks | Speed |
|---|---|---|
 China | China Unicom | 5G |
 Japan | KDDI/au | 5G |
 South Korea | SKTelecom | 5G |
Good to know
- Data only: your own number keeps working for calls and texts
- Hotspot works where your phone and the network allow it
- Plans start when you first connect; install within 180 days
- Your data routes through Hong Kong, so some sites may show that country
- Top up the same eSIM any time, no new QR code
Which countries and networks does the China, Japan & South Korea eSIM cover?
Three countries, and all three have 5G. One eSIM covers Tokyo, Seoul and Beijing, so you won't swap plans on the way.
Each country joins its own mobile network, so you're on local networks the whole way:
- Japan: joins the KDDI/au network
- South Korea: joins the SKTelecom network
- China: joins the China Unicom network
Your phone switches network by itself at each border. Your data reaches the internet through Hong Kong, a normal setup for travel eSIMs, and you can read more about IP addresses abroad.
How much data do you need in China, Japan & South Korea?
Light: maps, messages, email (about 0.25 GB a day). Standard: plus social, music, some video (about 0.7 GB a day). Heavy: plus streaming, video calls, hotspot (about 1.8 GB a day).
3 days
- Light · about 800 MB1 GB · 7 days · £4.99 / €5.99 / $5.99
- Standard · about 2 GB500 MB a day · 5 days · £9.99 / €11.49 / $12.99
- Heavy · about 5 GB500 MB a day · 15 days · £13.99 / €16.49 / $17.99
7 days
- Light · about 2 GB500 MB a day · 7 days · £9.99 / €11.49 / $12.99
- Standard · about 5 GB500 MB a day · 10 days · £9.99 / €11.49 / $12.99
- Heavy · about 13 GB1 GB a day · 15 days · £24.99 / €29.99 / $32.49
14 days
- Light · about 4 GB500 MB a day · 15 days · £13.99 / €16.49 / $17.99
- Standard · about 10 GB1 GB a day · 15 days · £24.99 / €29.99 / $32.49
- Heavy · about 25 GB2 GB a day · 15 days · £48.49 / €57.99 / $62.99
30 days
- Light · about 8 GB500 MB a day · 30 days · £27.49 / €32.49 / $35.49
- Standard · about 21 GB20 GB · 30 days · £45.99 / €54.99 / $59.99
- Heavy · about 54 GB2 GB a day · 30 days · £96.49 / €115.49 / $125.49
How to set up your China, Japan & South Korea eSIM
Install at home
On Wi-Fi, tap Install on iPhone (iOS 17.4+), scan the QR code, or type the two codes from your email.
Switch on when you land
Turn on your eSIM line, choose it for mobile data and switch Data Roaming on for that line.
You're online
Your phone joins China Unicom and your plan starts. Check data left on your eSIM page.
Using one eSIM across China, Japan & South Korea: tips
- Three borders, one line: Install your eSIM at home, then keep data roaming on for the eSIM line at every border between Japan, South Korea and China.
- Rides and chat: GO, Uber and DiDi in Japan, Kakao T and Uber in South Korea, and DiDi in China. Chat with LINE in Japan, KakaoTalk in South Korea and WeChat in China.
- Maps and blocked apps: In South Korea, Naver Map and KakaoMap give walking and transit directions where Google Maps can't. In China, Google Maps is unreliable and Google services, WhatsApp, Instagram, Facebook, YouTube and X (Twitter) are blocked, so set up and sign in to the apps you need before you arrive, and use Baidu Maps or Amap (Gaode).
- Your home number: Keep your home number for calls and texts, and learn how to keep WhatsApp and your home number before you fly.
- Top up mid-trip: Most plans can be topped up, so you can add data on the road if your trip runs long.
China, Japan & South Korea eSIM questions
How much is an eSIM for China, Japan & South Korea?
China, Japan & South Korea eSIMs start at £3.99 for 500 MB a day over 1 day. A 5 GB plan for 30 days costs £16.99. Prices include any taxes and show in pounds, euros or dollars.
Which countries does the China, Japan & South Korea eSIM cover?
One eSIM works in all 3 countries: China, Japan and South Korea. The full list with the network in each country is on this page.
When does my China, Japan & South Korea eSIM start?
Most plans start the moment your eSIM first connects to a network in China, Japan & South Korea, so you can buy and install it at home before you fly. Install it within 180 days of buying.
Can I top up my China, Japan & South Korea eSIM?
Yes. Most China, Japan & South Korea plans can be topped up from your eSIM page in two taps, with no new QR code. The plan table on this page shows which ones.
Does it come with a phone number?
Every eSIMology plan is data only. Keep your own SIM switched on for calls and texts, and use WhatsApp, FaceTime or any calling app over your eSIM's data.
What if my plans change?
Cancel an eSIM you haven't installed within 30 days for a full refund to your card, in two taps from your eSIM page.
Does the China, Japan & South Korea eSIM work in Japan?
Yes, Japan is one of the three countries, so you can go from Tokyo to Okinawa on one eSIM. Plan rides with GO, Uber or DiDi. Free public Wi-Fi often asks you to register first, so your mobile data comes in handy.
Does the China, Japan & South Korea eSIM work in South Korea?
Yes, South Korea is one of the three countries, so Seoul, Busan and Jeju Island are all on one eSIM. Kakao T and Uber cover rides, and Naver Map and KakaoMap give walking and transit directions where Google Maps can't.
Does the China, Japan & South Korea eSIM work in China?
Yes, China is one of the three countries, but Google Maps is unreliable there. Locals use Baidu Maps and Amap (Gaode) for walking, driving and transit. WhatsApp, Instagram, Facebook, YouTube and X (Twitter) are blocked, so set up the apps you need before you arrive.
Is there 5G on the China, Japan & South Korea eSIM?
Yes, 5G is covered in all three countries: China, Japan and South Korea. Whichever of those you visit, it's the same eSIM doing the work for you.
Can I use one eSIM for Japan and South Korea on the same trip?
Yes, Japan and South Korea are both among the three countries, so one eSIM covers a trip from Tokyo to Seoul. Many Korean apps ask for a local phone number to sign up, which a travel eSIM may not provide, so check those sign-ups early.
Can I use one eSIM for China and Japan on the same trip?
Yes, China and Japan are both among the three countries, so you can go from Beijing to Osaka on one eSIM. In China, WeChat is the messaging app to set up, and in Japan, it's LINE.
Ready for China, Japan & South Korea?
Buy now, install today, and your plan waits until you land. Full refund if not installed.