Five travel hacks for cheaper data abroad

Short answer: the cheapest data abroad is the data you plan for. Check what your home carrier would charge, switch to a fixed-price travel eSIM if that is clearer, download maps and media on Wi-Fi before you go, and stop apps from using data in the background. None of these needs special tools, and you can do them all before you leave.

1. Find out what roaming would cost you

Start with your own carrier, because the answer is different for everyone. Open its travel or roaming page and note three things for your destination: the price per day or per trip, the data cap, and what happens after the cap. Some plans slow down, some stop, and some keep charging by the megabyte.

Write the numbers down. They are your baseline for every other option, and you should use only current figures from your carrier, not an old blog post (including this one).

2. Compare it with a travel eSIM

A travel eSIM is a data plan you install on your phone with a QR code, so there is no plastic SIM to find or swap. You pick a plan for your destination, see the price before you pay, and use that data on your phone. On a dual-SIM phone your home SIM can stay active for calls and texts.

• Browse plans on the destinations page, or open your country directly, for example Japan or Turkey.
• No account or registration is needed to buy and install; the setup guide walks through iPhone and Android.
• Check that your phone supports eSIM and is carrier-unlocked before you buy.
• Visiting several countries? Look for a regional plan on the destinations page instead of buying one plan per country.

Then compare the plan price with the baseline from hack 1. For a short trip with a cheap daily pass, roaming can win; for a longer stay or a heavy user, a fixed plan is often easier to predict. Your carrier's terms decide, so do the sum yourself.

3. Download before you go

Maps, playlists, podcasts, shows, boarding passes and translation packs all use data if you fetch them on the road. Get them on home Wi-Fi first.

• Offline maps: most map apps let you save an area for offline use. Save your city, plus the airport and the route between them.
• Offline translation: many translation apps offer downloadable language packs.
• Entertainment: download episodes and playlists for flights and train rides.
• Documents: save tickets, hotel confirmations and addresses where you can open them without a signal.

4. Stop apps spending data in the background

Your phone uses data even when you are not looking at it. A few settings changes help:

1. Turn on your phone's data saver or low data mode.
2. Switch app updates and cloud photo backup to Wi-Fi only.
3. Turn off auto-play for video in social apps.
4. Check the per-app data list in your settings after a day or two and restrict whatever is using the most.

5. Make sure the right line is carrying your data

The most expensive mistake is the quiet one: your phone using your home carrier's roaming while you think the travel plan is doing the work.

• Once your eSIM is active, set it as the line for mobile data.
• Turn off data roaming on your home SIM, so it cannot pick up the slack if the eSIM line drops.
• Keep calls and texts on your home SIM only if you know your carrier's rates for them.

Do this check on arrival, then once more after your first day.

A short pre-trip checklist

• Carrier roaming price and cap noted for your destination
• Phone confirmed eSIM-capable and carrier-unlocked
• Plan chosen and eSIM installed with the setup guide
• Maps, tickets and media downloaded on Wi-Fi
• Data saver on, roaming off on your home SIM

FAQ

What is the cheapest way to get data abroad?

It depends on your carrier, your destination and how long you stay. Compare your carrier's current roaming terms with the price of a travel eSIM plan for the same trip.

Do I need to install a travel eSIM before I fly?

You can, and many travellers prefer it so they are connected on arrival. Check the plan details for when its validity starts.

Can I keep my home number?

On a dual-SIM phone, your home SIM can stay active for calls and texts while the eSIM handles mobile data.

Does an eSIM work on every phone?

No. Your phone needs to support eSIM and be carrier-unlocked. Check both before you buy.