What Is an eSIM? The Ultimate Guide for Travelers, Nomads & Expats

Need mobile data while traveling, working remotely, or living abroad? Hereโ€™s everything you need to know about eSIMs.

Staying connected while abroad has never been more importantโ€”or easier. Whether you’re hopping between countries, working remotely from a beach town, or settling into life in a new country, mobile data is essential. But swapping out physical SIM cards can be a hassle.

Thatโ€™s where eSIMs come in. But what is an eSIM, exactly? Theyโ€™re digital, flexible, and built for modern travelers. In this guide, youโ€™ll learn what an eSIM is, how it works, what makes it so useful, and which eSIM providers are best depending on your travel style. Whether youโ€™re a curious first-timer or a seasoned globetrotter, this guide will help you stay connected wherever you go.

What Is an eSIM?

what is an esim

An eSIM is essentially just a digital version of a traditional SIM card. Instead of popping a tiny plastic card into your phone, an eSIM is embedded in your device and activated with a simple download or QR code. It stores the same information as a physical SIM but lets you switch carriers, plans, or phone numbers without physically changing anything.

Think of it as a digital SIM card that lives inside your phone. You just install it once, and youโ€™re good to go.

eSIM vs Physical SIM

  • eSIMs are built into your device, while physical SIMs require a slot.
  • No need to swap cards when changing plans or traveling.
  • Store multiple eSIM profiles on one device and switch between them easily.
  • Smaller risk of damage or loss. No more tiny cards falling behind the hotel nightstand.

If youโ€™ve ever tried to get a paperclip into that tiny hole that pops the SIM tray out, youโ€™ll appreciate just how great eSIMs are.

How eSIMs Work

eSIMs are designed to make your mobile life easier. Hereโ€™s how they work from setup to switching.

Setting Up An eSIM

Setting up an eSIM is fast and straightforward. Here’s how it usually works:

  1. Choose a provider โ€“ Buy an eSIM plan online through a providerโ€™s website or app.
  2. Receive a QR code or activation code โ€“ Most providers will send a QR code by email.
  3. Activate your eSIM โ€“ Go into your phoneโ€™s settings, scan the QR code, and activate it. Thatโ€™s it!

The process takes just a few minutes. No visits to a mobile store, no paperwork, no SIM trays.

Device Compatibility

Most modern phones, tablets, and even smartwatches support eSIMs. Some popular eSIM-compatible devices include:

  • iPhone XR and newer (including SE models)
  • Google Pixel 3 and newer
  • Samsung Galaxy S20 and newer
  • iPads with cellular support (iPad Pro, Air, Mini)
  • Some Lenovo and Windows laptops

Go to your deviceโ€™s settings and search for โ€œeSIMโ€ or โ€œCellular Plansโ€ to see if itโ€™s supported.

Switching Between Networks & Plans

One of the biggest perks of eSIMs is flexibility. You can:

  • Store multiple eSIMs on one device (great if you travel a lot)
  • Switch between profiles with a tap in your settings
  • Use one plan for data and another for calls
  • Turn one line off temporarily without deleting it

This makes it easy to travel, compare local providers, or keep your home number active while using local data abroad. Once you get the hang of how eSIMs work, you’ll wonder how you ever traveled without one.

Best eSIM Providers for Travelers

Travelers need flexibility, convenience, and data that works right out of the gate. eSIMs are perfect because they skip the airport SIM kiosk and let you land connected.

Factors To Consider

Before choosing a provider, think about:

  • Where are you going? Make sure the provider covers your destination.
  • How long will you stay? Some eSIMs are better for short trips, while others offer longer validity.
  • How much data do you need? Light users might only need 1โ€“3GB, but streamers or remote workers might need 10GB+.
  • Do you need a local number? Most eSIMs offer data only โ€” but some offer airtime/SMSes, too.

Recommended eSIM Providers for Travelers

Let’s look at the top eSIM providers for travelers

Airalo

Airola eSIM

Airalo is great for travelers on a budget. Offers regional and global eSIMs with low prices and decent speeds. Plus, their app is super easy to use, and they offer you a free eSIM to get started!

Holafly

Holafly eSIM

Holafly offers unlimited data plans in 100+ countries. Perfect for travelers who stream, work remotely, or just donโ€™t want to track their usage.

GigSky

GigSky eSIM

GigSky has really good international coverage and flexible pricing. Great if youโ€™re visiting multiple countries in one trip.

Best eSIM Providers for Digital Nomads

Digital nomads often travel to multiple countries in a single year โ€” and they need internet that moves with them. 

(Psst. If you’re looking for tips on nomad travel, check out our guide to digital nomad visas)

What Nomads Need

Unlike travelers, digital nomads need eSIMs with a bit more “oomph”.

  • Longer validity periods (15โ€“90 days or more)
  • Global or regional coverage
  • Hotspot support so they can connect their laptop
  • Consistent speeds across countries
  • Recharge options or subscriptions

Recommended eSIMs for Nomads

Let’s look at the top eSIMs for digital nomads.

Ubigi

Ubigi eSIM

Ubigi offers good global packages with hotspot support. They’ve also partnered with major carriers for stable connections.

Flexiroam

Flexiroam eSIM

Flexiroam is ideal for global travel for digital nomads. Long validity (up to a year), and you can top up from anywhere.

Nomad

Nomad eSIM

Like the name says, Nomad is great for nomads! Offers multi-country regional plans and a smooth user experience.

Best eSIM Providers for Expats

If youโ€™re living abroad long-term, youโ€™ll want an affordable, reliable plan that feels like a local one. 

Key Features

  • Monthly or annual plans
  • Good local data speeds
  • Voice/SMS support if needed
  • Customer service in your preferred language
  • Coverage in your neighborhood (not just city centers)

Top Picks for Expats

Let’s look at the top eSIMs for expats.

Sim Local

Sim Local eSIM

Sim Local‘s eSIM services are available in over 150 countries through partnerships with local mobile network operators. They have standalone retail stores in major international airports and offer an online platform for eSIM purchases

Saily

Saily ESIM

Saily offers affordable and flexible eSIM plans with coverage in over 150 countries. Their user-friendly app allows for easy plan management and activation.

BNESIM

BNESIM

BNESIM offers global coverage, customizable data plans and additional services like international phone numbers, catering to the needs of frequent travelers and expatriates.

About the Air Doctor App

With the Air Doctor app in your pocket, you can easily access medical care anywhere else you travel.

Air Doctor offers a wide range of benefits, including:

  • A global network of over 20,000 multi-lingual doctors and specialists
  • Choice of clinic, at-home (hotel), and video consultations
  • Active in 90+ countries
  • 24/7 multi-lingual support
  • Most common medical specialties, including pediatricians and dentists

If youโ€™re looking for reliable, accessible, and global medical assistance, the Air Doctor app is perfect for you. Download the app before your next trip to ensure peace of mind and access to quality healthcare, wherever your travels take you.

FAQs

What are the downsides to an eSIM?

Some devices donโ€™t support them. Transferring an eSIM between phones is sometimes trickier than moving a physical SIM.

Do you keep your number with an eSIM?

Yes, if your carrier supports number porting or if youโ€™re using your main carrierโ€™s eSIM. Many eSIM plans for travel are data-only, so you may not get a number unless specified.

Can I have an eSIM and a physical SIM?

Absolutely! Many phones support Dual SIM, letting you keep your home SIM while using a local eSIM for data.

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Jenny Cohen Drefler

Jenny Cohen Derfler

Air Dr CEO & Co-Founder

Jenny is the CEO and one of the Co-Founders at Air Doctor. She spent more than 20 years at Intel, most recently as general manager of its manufacturing facility in Israel and before that in various engineering and manufacturing roles in Silicon Valley. Air Doctor is her second startup having previously founded electric vehicle company ElectRoad.