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Roam cheaper in Japan

Wheels down, airplane mode off, and your phone becomes a choice: pay $12.99 a day to roam, or go dark and find your hotel from memory. Neither. Land already connected, for less than the taxi from the airport.

Build the itinerary โ†’

No account. No email. Your trip stays in your browser.

Keep scrolling. You're flying

One phone, every country

The same handset, landing again and again. Every network and every fare below is real, read from the same dataset the planner prices with.

    Settings โ†’ Mobile Data โ†’ Network Selection

    Pick where you're landing

    Every fare below was read off a provider's own store by hand, and every row names the local network your phone will actually roam on.

    Select Network โ— Fares checked
    Automatic: OFF. That's rather the point All 35 destinations โ†’
    The part nobody else does

    Build the itinerary

    Add every stop. Multi-country trips are exactly where the usual advice falls apart, so that's what this is built around.

    1 Where are you going?

    2 How much data will you actually use?

    Nobody knows how many gigabytes they need. Everybody knows what they do on their phone. We ask the answerable question.

    Pick the one that sounds most like you on holiday.

    Anything else true about this trip?

    3 What matters most?
    The notifications you'd want in advance

    Four traps nobody puts on the pricing page

    These are the things that turn a good deal into a bad trip. The planner above checks for all of them.

    1. Data Roaming before you buy

      "Unlimited" has a speed limit

      Airalo's unlimited plans are widely reported to throttle somewhere around 3GB a day. Holafly's carrier fair-use sits around 3โ€“5GB. Neither publishes a hard number on the buy page. Unlimited means unlimited gigabytes, not unlimited speed. If you're tethering, you will find the ceiling.

    2. Personal Hotspot before you buy

      The hotspot cap is a separate cap

      Holafly's unlimited plans cap hotspot sharing at 1GB per day. If your plan for the trip is "work off my laptop through my phone", an unlimited plan with a 1GB tether cap is the wrong purchase at any price. This is the most expensive mistake in the category.

    3. Plan Expiry before you buy

      Validity is wall-clock, not usage

      A 7-day plan dies on day 7 whether you used 200MB or 20GB. On a 10-day trip that's two plans, two activations, and a gap in the middle if you're not paying attention. Plenty of "cheapest per GB" winners are only cheapest because their validity window doesn't fit your trip.

    4. Price Per GB before you buy

      Price-per-gigabyte rewards junk

      Sort any eSIM database by price and the top fills with 100MB novelty plans for thirty cents from brands you've never heard of. Sort by price-per-GB and you get 50GB packs you'll never exhaust. The only number that matters is what it costs to keep this phone online for this trip.

    Screen time, priced

    How much data does each app use?

    Per hour, at the quality you're most likely to be on. Sorted by how much damage they do.

    Mobile data used per hour by app
    App Quality Per hour 1GB lasts Source

    Published means the service states the figure itself. Bitrate means it's arithmetic from a documented stream rate. Measured means it's corroborated across independent tests. Real usage moves with signal strength and how aggressively the app pre-buffers. These are planning numbers, not a meter.

    Know the field

    Who else is comparing eSIMs

    There are a lot of these now. They fall into four groups, and they share a blind spot.

    The databases

    eSIMDB and friends list hundreds of thousands of plans across 200-odd providers. Genuinely comprehensive. But they're country-first and price-sorted, so the top of every list is a 100MB plan from a brand with no track record. And they assume you already know your number.

    The affiliate farms

    Hundreds of "Best eSIM for [country] 2026" pages. Ranking tends to track commission rather than fit. One "11 providers compared" page we checked turned out to be a table of discount codes with no prices in it at all.

    The quizzes

    A handful of tools ask three questions and name a provider. Closest to the right idea. They map a travel-style label onto a gigabytes-per-day number and stop there: no itinerary, no validity maths, no warning about the tether cap.

    The providers themselves

    Every big provider publishes "X vs Y" comparisons. They are, without exception, comparisons that X wins. Useful for spec sheets, useless for deciding.

    The gap in all four: nobody starts from the trip. Real itineraries have three stops in two regions and an awkward eleven nights, and that's exactly the case where the answer stops being obvious. So that's where this one starts.