Buying guide · eSIM · 6 min read

How to Choose a Travel eSIM

A travel eSIM is a digital SIM you download to your phone so you can use mobile data abroad without swapping a physical card. It can be simpler than roaming or buying a local SIM at the airport, but only if your phone supports it and the plan fits your trip.

Reviewed November 2026
  1. 1

    Confirm your phone supports eSIM

    Many recent phones support eSIM, but not every model or regional version does. Check your phone's settings or the manufacturer's site before buying anything.

  2. 2

    Make sure your phone is unlocked

    A phone locked to your home carrier may refuse an eSIM from another provider. Ask your carrier if you are unsure.

  3. 3

    Choose local, regional or global

    Local plans cover one country, regional plans cover several countries, and global plans cover many. If you are visiting more than one country, a regional plan can save setting up several eSIMs.

  4. 4

    Estimate how much data you need

    Maps, messaging and browsing use relatively little data, while video calls, streaming and hotspot use add up fast. Pick a plan with some headroom and check whether you can top up.

  5. 5

    Check what the plan includes

    Many travel eSIMs are data-only, so calls and texts may need to go through apps instead. Check the validity period, which networks are used and whether hotspot sharing is allowed.

  6. 6

    Install before you leave

    Installing usually needs an internet connection, so set it up at home on Wi-Fi. Read the provider's instructions on when the plan starts, since some activate on installation and others on first connection abroad.

Common mistakes

  • Buying before checking the phone is compatible and unlocked.
  • Deleting the eSIM profile by mistake; it may not be reinstallable.
  • Leaving data roaming off on the travel eSIM line.
  • Forgetting the home SIM can still roam and charge you if left active for data.

Brands this guide applies to

Each has its own BuySmart guide with ways to save and alternatives.

  • Airalo

    Travel eSIM marketplace

    Buy prepaid mobile data eSIMs for travel in many countries and regions

    Travel eSIMs & Mobile DataWorldwide

  • Jetpac

    Travel eSIM provider

    Travel eSIM provider selling prepaid mobile data plans for trips abroad

    Travel eSIMs & Mobile DataWorldwide

  • Instabridge

    Wi-Fi app and eSIM

    Community Wi-Fi finder app that also sells mobile data eSIMs

    Travel eSIMs & Mobile DataWorldwideFeatured

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FAQ

Can I keep my normal number while using a travel eSIM?

On phones that support dual SIM, you can usually keep your main line active for calls and texts while using the eSIM for data. Turn off data roaming on your main line to avoid roaming charges.

Do travel eSIMs come with a phone number?

Many are data-only and have no number for regular calls. Some providers offer plans with calls or texts; check the plan details.

When does my eSIM plan start?

It depends on the provider. Some plans start when installed and others when they first connect to a supported network. Check the provider's activation policy.

What if the eSIM does not work when I land?

Check that the eSIM line is turned on, data roaming is enabled for it and it is set as your data line. If that does not help, contact the provider's support and ask about their refund terms.

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