DestinationsJapan & South Korea

Japan & South Korea eSIMs

Name: Japan & South Korea eSIM
Brand: Roamo

Japan & South Korea

2 countries · local carriers5G

See 6 plans

If you're running low, you can always top up

Install over Wi-Fi · activates the first time you connect locally

Coverage

2 countries included

South KoreaJapan

Data

Choose your package

7 days

1GB$1.35USD

30 days

Local networks

KDDI/au · LG U+, SKTelecom

Roamo picks the strongest signal automatically. You can't pick the carrier manually — that's a feature, not a bug.

IP egress

Routes via SG

Streaming services and geo-locked sites will see this country as your origin — handy for hotel Wi-Fi captive portals.

How to install

Up and running in 3 minutes.

01
Pick your plan
Choose the data + days that match your trip. Pay with Apple Pay, Google Pay, or any card.
02
Install over Wi-Fi
Scan the QR before you fly. iOS adds the eSIM in about 30 seconds. No physical SIM swap.
03
Land and connect
The eSIM activates the first time you connect to a local network. Your home SIM keeps your number.

Compatible with any iPhone XS or newer, Pixel 4+, Samsung Galaxy S20+, and most recent eSIM-capable Android devices.

FAQ

Common questions about Japan & South Korea.

Will the eSIM work as soon as I land in Japan & South Korea?

Activation kicks in the first time you connect to a local network. You may need to enable the Roamo line in Settings → Cellular when you arrive.

Can I keep my home number for calls and texts?

Yes. Roamo is data-only and installs alongside your home SIM. WhatsApp, iMessage, and your phone number all keep working on your primary line.

What speeds will I get?

Full 5G where carriers have rolled it out, 4G LTE elsewhere. We do not throttle — speeds match the local carrier directly.

Does the same eSIM work across all 2 countries?

Yes — one eSIM, one bill, and it switches to the best local network automatically as you cross borders. No re-install.

What happens if I run out of data?

Tap "Top up" in your dashboard. The new data lands on the same eSIM — no re-install needed.

Will my phone work with this eSIM?

Any iPhone XS or newer, recent Pixel, Samsung Galaxy S20+, or modern OnePlus / Xiaomi with eSIM support. We check compatibility automatically at checkout.

How do refunds work?

Full refund within 30 days if you haven’t installed the eSIM on a device. Once installed (even if you never connect to a network), the eSIM is locked to that device and the plan can no longer be refunded.

Buy your Japan & South Korea eSIM today. Activate when you land.

See 6 plans