Mobile Companion eSIM

Mobile Companion eSIM

Japan eSIM: 5G travel data

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Details

Released
August 17, 2026
Updated
November 5, 2026

Features

Mobile Companion eSIM screenshot #1 for iPhone
Mobile Companion eSIM screenshot #2 for iPhone
Mobile Companion eSIM screenshot #3 for iPhone
Mobile Companion eSIM screenshot #4 for iPhone
Mobile Companion eSIM screenshot #5 for iPhone
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About

Your Japan eSIM at a low price, ready before you fly. Choose your data, pay in the app and install your eSIM at home in 1 minute: you’re online as soon as you land. No subscription, no hidden fees, no SIM card to hunt for at the airport. THE RIGHT PRICE • Plans in every size: a few GB for Maps and messaging, much more for video • Your plan starts at your first connection in Japan, not when you buy it: buy early, you won’t lose a day • Need more data? Top up the same eSIM in the app • Our prices next to the big eSIM brands, checked and dated: mobile-companion.com/en/compare A CONNECTION THAT WORKS • NTT docomo’s 5G network, with a Japanese IP address: unlike your usual plan abroad, your data doesn’t detour through your home country • It connects by itself as soon as you switch off airplane mode • Your usual SIM stays in place for calls and texts • Share your connection with your other devices • A real person replies on WhatsApp, 24/7, in English or French EVERYTHING IN THE APP • Checks that your phone is compatible before you buy • Your remaining data and validity at a glance, also in a widget • An alert when you’ve used half your data, then when you’re running low • Pay by card or Apple Pay, sign in with email, Google or Apple • The same account as on mobile-companion.com HOW IT WORKS 1. Choose your Japan plan 2. Pay securely 3. Install your eSIM at home, over Wi-Fi 4. Land: it connects by itself A question before or during your trip? Message us on WhatsApp from the app, any time.
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What's New in Mobile Companion eSIM

1.0.9

November 5, 2026

Bug fixes.