Skip to content
Voygoing

Travel eSIM: seven things to confirm before you buy

A travel eSIM gives you local data rates without swapping a physical SIM card. But there are a few things to confirm first — phone compatibility, carrier lock, data estimates, and timing. Work through the checklist below before you buy.

Pre-departure eSIM checklist

Seven things to confirm before buying a travel eSIM. Expand each item for details on how to check.

  • Your phone supports eSIM

    iPhone XS (2018) or later, most Android flagships from 2020 onwards. On iPhone: Settings → General → About → look for "Available SIM" or "No SIM" — if you see "EID", eSIM is supported. On Android: Settings → Connections → SIM card manager → check for "Add eSIM".

  • Your phone is carrier-unlocked

    Carrier-locked phones only work with that carrier's SIMs. If you bought your phone outright or your contract has ended, it's usually unlocked. Check by calling your carrier, or on iPhone via Settings → General → About → "Carrier Lock" should say "No SIM restrictions".

  • You're OK with data-only (calls via apps)

    Most travel eSIMs are data-only — no local phone number. Calls and texts go through WhatsApp, FaceTime, Signal, etc. over your data connection. If you need a local number, look for eSIM plans that include a local number (fewer options, higher cost).

  • Your destination is covered

    Airalo covers 200+ countries and regions. Before you buy, confirm your destination is listed and check which local network the eSIM uses — in some places one carrier has much better rural coverage than another.

  • You've bought the eSIM before you fly (but not activated it)

    You can purchase and install an eSIM at home over Wi-Fi — useful because scanning the QR code requires an internet connection. Set the activation date to when you land, or activate manually. Most travel eSIMs are valid for 30 days from activation, not from purchase.

  • You've estimated how much data you need

    A rough guide: 1 GB per day covers maps, messaging, and light browsing. Add more if you'll video-call or stream. It's usually cheaper to buy a larger plan than to top up. For a 7-day trip with moderate use, 5–10 GB is a reasonable starting point.

  • You've kept your home SIM active as a backup

    Switch to the travel eSIM as your default for data, but keep your home SIM for calls and texts if your plan includes them. On dual-SIM phones, both can be active simultaneously. Check that roaming charges on your home plan are off if you're not using it for data.

To find a plan once you've worked through the list above, search "Airalo [your destination]" — they cover 200+ countries with data-only plans you can install before you fly.

What is a travel eSIM?

An eSIM (embedded SIM) is a digital SIM card built into your phone. Instead of buying a physical SIM card at the airport, you download a carrier profile onto your existing eSIM chip — usually by scanning a QR code. You can store multiple eSIM profiles and switch between them, which means keeping your home SIM active while running a travel data plan on the same phone.

The practical result: you land with local data rates already set up, no queuing at an airport kiosk, and no risk of losing a tiny physical card in transit.

Which phones support eSIM?

Most modern smartphones do. A quick reference:

Carrier lock is the main catch. A carrier-locked phone only works with that carrier's SIMs — even if it has an eSIM chip. If you bought your phone on a subsidised contract, it may be locked. Check before you travel: on iPhone, Settings → General → About → "Carrier Lock". If it says "No SIM restrictions", you're free.

How to set up a travel eSIM

  1. Buy the plan before you fly. You need a Wi-Fi connection to scan the QR code and install the eSIM profile, so doing it at home is simpler than scrambling at the airport.
  2. Install the profile. Scan the QR code from your confirmation email, or paste the activation code manually. Your phone will download the carrier profile — takes about a minute.
  3. Set an activation date (or activate manually). Most plans let you choose when to start the data clock. Set it to the day you land, so the 30-day window starts there, not when you install.
  4. Set it as your default data line on arrival. In your SIM settings, switch "Mobile data" to your travel eSIM. Keep your home SIM active for calls if needed, but turn off its data roaming.

eSIM questions, answered

Will my phone work with a travel eSIM?

Most modern smartphones do: iPhone XS (2018) and later, Samsung Galaxy S20+, Google Pixel 3a+, and most flagship Androids from 2020 onwards. The fastest check: open your phone's SIM settings and look for an "Add eSIM" or "Download SIM" option. If it's there, you're good. Carrier-locked phones are the main exception — check your carrier-lock status first.

How long before my trip should I buy an eSIM?

You can buy and install an eSIM any time before you leave — some travellers do it weeks ahead. The key step (scanning the QR code and installing the profile) needs a Wi-Fi connection, so doing it at home is easier than scrambling at the airport. You activate the plan when you land and switch the eSIM to your default data line.

Can I use an eSIM and my home SIM at the same time?

On most modern dual-SIM phones, yes. You keep your home SIM active for calls and home-country texts, and use the travel eSIM for local data. You set the travel eSIM as the default for mobile data and turn off data roaming on your home SIM. The result: local data rates, no roaming bill, and your home number still rings.

What if I run out of data?

You can top up on Airalo without buying a new eSIM — add more data to the same plan, or install an additional eSIM on dual-SIM devices. That's one reason to err slightly over your estimate rather than under: topping up mid-trip when you need navigation is stressful.

Does an eSIM give me a local phone number?

Most travel eSIMs are data-only — no local number. You can receive calls and messages over apps (WhatsApp, FaceTime Audio, Google Voice) on your data connection. If you specifically need a local number for two-factor authentication or to call local businesses, look for eSIM plans that include a number — they exist but cost more and cover fewer countries.

Sorting the rest of your trip

Once your data plan is sorted, the other pre-trip box to tick is insurance. Our travel insurance checker shows the legal cover your destination requires (including the €30,000 a Schengen visa needs), and how policies typically handle skiing, diving, and pre-existing conditions. We never let commission change what we recommend — see our methodology.

Last updated . eSIM compatibility, carrier lock policies, and coverage vary by device, carrier, and country and change over time. Confirm with your device manufacturer and network provider before relying on this information.