An honest question deserves an honest answer: no, you can't make calls or send texts with the travel eSIM itself. A travel eSIM is a data bundle without a phone number. That sounds like a limitation, but in practice you'll barely notice it. Everything you actually want to do on a trip (messaging, video calls, staying reachable on your own number, even booking a table at a restaurant) works just fine. In this article we'll lay out exactly what does and doesn't work, and how to cover the gaps.
A travel eSIM is a data bundle, not a phone plan
A travel eSIM has no phone number attached to it. So no classic phone calls, and no sending or receiving SMS through the eSIM. What you do get: mobile internet in your destination country, prepaid and without surprises. When the bundle runs out, it simply stops. No extra charges, no bill shock, just top up if you need more.
That data-only model is exactly why travel eSIMs can be so cheap: you're not paying for calling minutes and text messages you'd never use anyway.
Calls happen through apps
For almost everyone, apps cover their entire calling behaviour these days. Over your travel eSIM's data, all of these just work:
- WhatsApp: voice and video calls, to anyone who also has WhatsApp.
- FaceTime: audio and video between Apple devices.
- Signal and Telegram: same story, voice and video over data.
A WhatsApp voice call only uses a few dozen MB per hour, video calls somewhat more. Want to know whether that fits your bundle? Our data calculator works it out for you in half a minute.
Your own number stays reachable
Here's the key point: a travel eSIM doesn't replace your own SIM, it sits alongside it. Your own SIM stays active in your phone for incoming calls and text messages. If someone calls your regular number, your phone simply rings. If your bank sends a verification code, it arrives as normal (receiving SMS abroad is always free).
How to set that up properly, including which roaming toggles to flip on and off, is covered in How to keep your own number with a travel eSIM.
What works through what?
| What do you want to do? | Via the travel eSIM | Via your own SIM | Via apps (over eSIM data) |
|---|---|---|---|
| Internet, Maps, social media | ✅ | ❌ (keep roaming off) | n/a |
| WhatsApp messages and calls | ✅ (data) | n/a | ✅ |
| Receiving calls on your own number | ❌ | ✅ | ❌ |
| Receiving SMS (bank codes) | ❌ | ✅ (free) | ❌ |
| Calling a phone number yourself | ❌ | ✅ (mind the rate outside the EU) | ✅ if they have the app |
| Sending SMS | ❌ | ✅ (costs money outside the EU) | ✅ via chat apps |
In short: data through the eSIM, reachability through your own SIM, conversations through apps. Together they cover everything.
What if you need to call a restaurant or taxi?
The classic edge case: you want to call a local number abroad, say a restaurant for a reservation or a taxi company. You have three options:
- Call via your own SIM. Always works. Within the EU it costs nothing extra thanks to "roam like at home". Outside the EU you'll pay a per-minute rate that can add up quickly, so keep it short or check your provider's website beforehand.
- Check whether the business is on WhatsApp. In many holiday destinations, WhatsApp is the norm for businesses; restaurants and taxi companies are often right there. That call then runs over your eSIM data at no cost.
- Ask your hotel or host. They'll almost always make a quick call for a guest.
In practice this comes up once or twice per trip at most, and a short call via your own SIM is perfectly manageable.
Emergency numbers always work
For completeness: emergency numbers like 112 always work, on any available network, regardless of which SIM you're using or how much data is left in your bundle. That's one thing you never need to think about.
Conclusion
No, you can't call or text through the travel eSIM itself: it's a data bundle without a number. But the combination of your own SIM (staying reachable, receiving codes, the occasional local call) and apps over the eSIM's data (WhatsApp, FaceTime) covers virtually everything you need while travelling. Most people don't miss classic calling for a second.
Looking for a data bundle for your next trip? Compare our eSIM bundles and instantly see the cheapest option for your destination.