How it works
Data-only eSIM or one with a number: which you actually need
Most travel plans are data only, and for nearly everything that's enough. When you genuinely need a local number, and what the alternatives are.
Dani Requena 5 min Photo by Daniyal Naqash on Unsplash It's one of the most common questions before buying, and it comes from a reasonable confusion: data only sounds like you're left without a phone, and that isn't what happens.
What data only means
That the plan doesn't come with a phone number of its own: it gives you an internet connection and nothing else. Your usual number stays in the phone, active, taking calls and texts as always.
With data you have messaging, calls and video calls through apps, maps, transport and everything else.
When you do need a local number
- To sign up for services in that country that require a local number.
- To phone small businesses with no website and no messaging.
- If you're renting a car or a flat and they want a local contact.
- And on long stays, where sooner or later somebody will ask for one.
On a one or two week holiday, none of those four usually comes up.
The alternatives if you need one occasionally
- Have your accommodation call for you, which they're usually glad to do and which solves the language too.
- Check whether the business answers on messaging, which in many countries is the normal channel.
- A plan that includes minutes, if your destination offers one.
- Or a local line, if you're staying a long time.
And one thing people ask a lot
With a data-only plan, WhatsApp is still yours: it's tied to your usual number, not to whichever card carries the data. There's nothing to verify again and you don't lose your groups.
Frequently asked questions
What does a data-only eSIM mean?
That it has no phone number of its own: it gives you internet. Your usual number stays active in your phone for calls and texts.
Can I make calls with a data eSIM?
Yes, through messaging apps, which run over the internet. To ring a local number without an app you need minutes or a local line.
Do I need a local number when travelling?
On a holiday, hardly ever. You do on long stays, or if you have to sign up for services in that country.
Does WhatsApp work?
Yes, with your usual number and your groups: it's tied to the number, not to whichever card carries the data.
