United Kingdom → 日本
Data in 日本, flying from United Kingdom.
EE roaming £35 5 days · standard rate, outside your bundle
eSIM Coffee — 5 days · no surprise on the bill
The number the others hide
Limit not disclosedThe supplier does not publish a fair-use policy for 日本. We would rather write that than present it as unlimited with no limit.
- Networks
- SoftBank
- Validity
- 5 days from activation
- Calls and SMS
- on your United Kingdom number, via apps
“Just add my carrier’s roaming pack” is the real alternative
It is one tap in an app you already have, from a company that already has your card. That is a genuinely good reason to choose it, and no comparison table beats convenience on its own.
- EE roaming
- What it costs is the difference above — per day of use, billed afterwards.
- eSIM Coffee
- What this costs is two minutes, once, before you fly.
What changes when you fly from United Kingdom
Since Brexit most UK carriers reintroduced EU roaming charges — check your plan before assuming it is included.
Carriers in United Kingdom — EE, O2, Vodafone, Three — charge roaming in 日本 per day of use. On a 5-day trip that approaches £35, and the bill arrives afterwards.
Before you fly
- Check your phone supports eSIM and is unlocked — the ten-second test.
- Install the eSIM at home, on Wi-Fi. Installing needs internet; activating does not.
- Turn data roaming OFF on your home SIM. That is the step that prevents the unpleasant bill.
- On landing, switch data to the eSIM and leave roaming ON for it.