Never pay roaming again
Land in a new country with data already working. Buy a plan before you fly, install it in a minute, and skip the roaming charges entirely.
JapanHow DeSIM works
No shops, no queues, no roaming bill — just data that works when you land.
- Tonight
Choose where you're going
Pick a country, a region, or a plan that works almost anywhere, and the amount of data you'll need.
- Before you fly
Scan one QR code
An eSIM is a data plan your phone downloads, so there's nothing to post and nothing to swap. It installs over your own wi-fi in about a minute.
- When you land
It's already working
Your plan stays dormant until you arrive, then connects on its own. Your usual number keeps working alongside it for calls and texts.
Why DeSIM
Bought in seconds, installed in a minute, and it works nearly everywhere.
One country, a whole region, or a single plan that works nearly everywhere you'd think to go.
One QR code
Scan at home over wi-fi. About a minute.
Questions
The things people ask before their first eSIM.
Guides
Working out whether an eSIM suits your trip, and getting it set up.
eSIM or roaming: what a two-week trip actually costs
We priced the same fortnight in Japan three ways — roaming, an airport SIM, and an eSIM bought before leaving.
18 Aug 2026 · 6 min readSort your data before you fly.
200+ destinations · installed in about a minute
