Guide

How much data do I need for travel? A simple way to work it out

What actually uses mobile data on a trip, how many GB you need for your travel style, and how to make your data plan last until the end of your vacation.

Published September 16, 2026 · Updated October 1, 2026 · 7 min read · MoreSim editorial team

For a week abroad, most travelers are fine with 3–5 GB of mobile data, as long as maps are downloaded in advance and photos and videos go over the hotel Wi-Fi. Daily video calls, stories and working from a laptop multiply that. To get your own number, add up a normal day — maps, messaging, social media, video — and put about a third on top.

What uses the most mobile data when you travel?

Apps use data very differently. Roughly speaking, they fall into three groups: light, medium and data-hungry. Exact figures are impossible to give, since everything depends on the app, its settings and video quality, but knowing the ballpark helps you plan.

Maps and navigation apps usually use little data: text, vector graphics and occasional downloads. A day of active sightseeing with route planning adds up to tens, sometimes hundreds, of megabytes. Satellite view and constant rerouting while driving push usage noticeably higher.

Text messages in messaging apps barely register on your plan. Voice messages are heavier than text but still modest. The real drain starts when photos and videos land in your chats with media auto-download switched on; then your plan gets used up even on things you never open.

Video calls, streaming and social apps with endless video feeds are the biggest data users. An hour-long video call or an evening of scrolling videos can easily take hundreds of megabytes, and at high quality it’s gigabytes. This is where the spread is widest: the same app can use several times more or less data depending on quality.

• Maps and navigation: light, especially with a map downloaded in advance.
• Text in messaging apps: barely counts.
• Voice messages: noticeable but manageable.
• Photos in chats and social media: medium, depending on how many.
• Video calls: heavy, depending on quality and call length.
• Video and stories: the heaviest, up to gigabytes in an evening.
• Cloud backups and auto-updates: quiet, and a lot at once.

How many GB do I need for a week of travel?

A typical vacation week uses around 3–5 GB, and the range across scenarios runs from 1–2 GB to 20 GB and more. These are rough guidelines, not measurements: find the row closest to your habits and look at the one below it too, since a bit of headroom almost never goes to waste.

The table doesn’t replace your own math, but it covers most cases. Two caveats. First, a short trip of three or four days almost never hits the data cap; what matters more there is the plan’s validity and the list of countries. Second, if you’re the one traveling but two devices use the data, multiply the estimate by the number of devices.

How to calculate how much data you need

The most precise estimate comes from your own mobile data stats for the last month: your phone already knows how much you use, and you just need to translate that to your trip.

1. Open your mobile data usage stats for the last month. The menu name varies by OS version: look for “Cellular”, “Mobile data” or “Data usage”.
2. Divide the monthly total by thirty to get your typical day.
3. Subtract what you won’t use on the trip: work tools, your usual commute podcasts, streaming at home.
4. Add what will come up: navigation in an unfamiliar city, a translator app, taxis, many more photos and videos.
5. Multiply by the number of days and add about a third on top for unexpected evenings at the airport and long calls home.
6. Compare the result with the table above. A big gap usually means Wi-Fi usage crept into your stats rather than mobile data.

Also think about whether you’ll have Wi-Fi. At a hotel or apartment, Wi-Fi takes most of the load off your mobile plan, and your real usage may end up several times lower than the estimate. On a hike, in a rental car or on a route through small towns, it’s the other way around: your phone is your only connection.

How to save mobile data while traveling

A handful of settings you change once before you fly saves most of your mobile data on a trip, and then they work on their own.

• Turn off auto-download of photos and videos in messaging apps, or limit it to Wi-Fi.
• Set video in social apps and on video platforms to data-saver or medium quality.
• Turn off automatic app updates over mobile data.
• Turn off cloud sync and automatic photo backup.
• Download offline maps, playlists and shows for the road at home.
• Send big files and videos from your trip in the evening over Wi-Fi.
• Check your remaining data every couple of days, not on the last evening.

Save boarding passes, bookings and addresses as screenshots: they open without a connection and save data at the airport and the front desk, where the network is often overloaded.

What to do if you run out of data on your trip

If you run out of data on your trip, first make sure the problem really is your data allowance and not your settings. You can see your remaining data in your account on the website and in the bot @moresim_bot. If you still have data but no connection, check which line is selected for mobile data and whether data roaming is on for it.

If the plan really is used up, you don’t need to replace the eSIM. Data is added to your current profile with “Top up data” on the eSIM card in your account or in the bot’s app, if top-ups are available for that plan. There’s no new QR code or reinstall; the line stays the same and your settings aren’t affected.

• Check your remaining data in the bot or in your account on the website.
• Check that data roaming is on for the right line.
• Top up the plan without a new eSIM: use “Top up data” on the eSIM card in your account or in the bot’s app, if top-ups are available for that plan.
• Until you top up, get by on cafe or hotel Wi-Fi, but avoid opening banking apps on public networks.
• If something doesn’t add up, message support, available via /support in the bot, a ticket in your account and email.

How much data to get for your trip: the bottom line

A typical traveler needs around 3–5 GB for a week, as long as maps are downloaded, auto-download is off and video goes over Wi-Fi. For daily video calls, working from a laptop and sharing data with a group, plan on 10–20 GB a week or more, and a MoreSim plan can be topped up in the bot if it runs low. Work out your own day with the steps in the section on doing the math, and choosing a plan stops being a guessing game.

Most of the time, “I’ve run out of data” doesn’t mean the plan is used up but that data roaming is off on the right line. Check your remaining data in your account or in the bot’s app: if the data is still there, it’s a settings issue, and we’ll help you with it any time — message us via /support in the bot.