Japan & South Korea eSIM Data Plans

3 GB / 30 days
CHF 8.00
Japan & South Korea eSIM Data Plans

Japan & South Korea eSIM Data Plans

CHF 8.00
4.7/5 3,872 traveller reviews
Delivered in seconds
No passport, no SIM swap
Secure checkout
24/7 support
Network & coverage

Stay connected across Japan & South Korea

One eSIM for Japan and South Korea — two of the world's best mobile networks on a single plan.

Countries included
JapanSouth Korea
Choose your data

Pick the plan that fits your trip

3 GB
30 days
A short trip — maps, messaging and ride-hailing.
5 GB
30 days
A week away — daily chat, photos and navigation.
MOST POPULAR
10 GB
30 days
Two weeks of travel — social media, maps and video calls.
20 GB
30 days
Heavy use or a full month — streaming, hotspot and remote work.
Traveller's guide

Staying connected in Japan & South Korea — what to know

A trip pairing Tokyo with Seoul stays connected on one plan, no SIM swap on the short flight across.

Both countries have superb, ultra-fast coverage deep into their metros and bullet-train lines.

What's included

Everything you need in Japan & South Korea

One eSIM, 2 countries
Cross between them freely — no SIM swapping, one plan for the whole trip.
Flexible data plans
From 3 GB to 10 GB — pay only for what you need.
4G/5G network
Auto-connects to the strongest local networks for the best signal.
Instant delivery
Your QR code arrives by email in seconds — no shipping, no wait.
Top up anytime
Running low? Add data in seconds — same eSIM, no reinstall.
Works on arrival
Validity starts on first connection — install ahead with zero waste.
Device support

Works on your phone

Almost every phone from the last few years supports eSIM. Not sure? Dial *#06# — if you see an EID number, you're good to go.

iPhone
iPhone XS, XR and every model since — including all iPhone 11, 12, 13, 14, 15 and 16.
Samsung Galaxy
Galaxy S20 and newer, Z Flip / Z Fold, Note 20, and most A-series from 2021 on.
Google Pixel
Pixel 3 and newer (Pixel 3a and later on all major networks).
Other Android
Most modern flagships from Motorola, OnePlus, Huawei, Oppo and more.
Why eSIM

AeroSims vs a local SIM vs roaming

AeroSims eSIM Local SIM Roaming
Ready before you land
Passport / ID needed None Required None
Setup time Under 2 min 30–60 min queue Auto (costly)
Keep your home number
Top up remotely ~
Typical week of data Fixed low price Varies $50–200+
How it works

Connected in 3 simple steps

1
Buy your package
Choose your data size and check out in 60 seconds. QR code emailed instantly.
2
Scan and install
Settings → Cellular → Add eSIM → scan the QR code. Under 2 minutes, done at home.
3
Land in Japan & South Korea and connect
Switch on your eSIM and you're online from the first minute — no queue, no roaming.
FAQ

Questions, answered

Will the Japan & South Korea eSIM work on my phone?+
Yes, as long as your phone supports eSIM and is carrier-unlocked. That covers iPhone XS and newer, Samsung Galaxy S20 and newer, Google Pixel 3 and newer, and most modern Android phones. Dial *#06# to check for an EID number.
How fast is the data in Japan & South Korea?+
Your eSIM connects to the strongest available local networks at 4G/5G speeds — fast enough for maps, video calls, streaming, social media and mobile hotspot.
Do I need a passport or registration?+
No. There's no ID check, no paperwork and no SIM registration. You buy online, receive a QR code by email, and install it yourself in under two minutes.
When does my plan start?+
Validity begins the moment your eSIM first connects to a network in Japan & South Korea — not at purchase. You can install it days ahead of your trip with zero waste.
Can I top up if I run out of data?+
Yes. Add more data to the same eSIM in seconds from your account — no new QR code and no reinstall needed.
Can I keep my normal number for calls and texts?+
Yes. The eSIM runs alongside your physical SIM, so your home number stays active for calls and bank codes while the eSIM handles data in Japan & South Korea.
What happens when my data runs out?+
Your connection simply pauses — no surprise bills, ever. Just top up to keep going, or buy a fresh package.
Can I use it as a mobile hotspot?+
Yes, tethering and hotspot are included, so you can share your connection with a laptop or a travel companion's phone.
Ready to explore Japan & South Korea?

Choose your data above and get instant access — delivered to your inbox in seconds.

3–10 GB · 4G/5G · instant delivery