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07 Oct 2026

How much mobile data do I need for a trip?

A practical guide to data use per day — maps, messengers, social media, video — and how to pick the right eSIM size without overpaying.

Most travellers buy either far too much data or run out on day three. The good news: phone data use is predictable once you know what eats it.

What uses how much

Typical sizes

How to avoid overpaying

Pick the smallest plan that covers your trip plus about 10% reserve. If you run out, you can top up the same eSIM in a minute — no new QR code needed. Turn off automatic app updates and photo backup over mobile data before you fly, and let videos load on hotel Wi-Fi.

Not sure? Our data calculator works out the exact size from your habits and trip length and shows the cheapest matching plan.

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