Complete guide to eSIMs for travel: how they work, best providers compared (Airalo, Saily, Yesim), costs, and why they've replaced physical SIM cards for travelers.
eSIMs have transformed how travelers stay connected abroad. No more hunting for SIM card shops at airports, no more fumbling with tiny nano-SIMs, and no more roaming horror stories. An eSIM lets you add a local data plan to your phone before you even leave home — activated with a QR code scan. Here's everything you need to know.
An eSIM (embedded SIM) is a digital SIM card built into your phone. Instead of inserting a physical card, you download a carrier profile. Most phones made since 2020 support eSIM: all iPhones from XS onwards, Samsung Galaxy S20+, Google Pixel 3+, and many others. You can have multiple eSIM profiles installed simultaneously and switch between them — keeping your home SIM for calls/texts while using a travel eSIM for data. This dual-SIM capability is the killer feature for travelers.
The travel eSIM market has exploded with options. The major providers compared: Airalo covers 200+ destinations with plans from $4.50 for 1 GB. Saily (by NordVPN team) offers competitive pricing and a clean app. Yesim covers 150+ countries with flexible plans. Drimsim offers a single global SIM with pay-as-you-go data. Each has different coverage, pricing, and data amounts. For detailed comparisons of plans and prices by destination, visit SimTravelGuide.com — our sister site specializing in eSIM comparisons.
The process is simple: 1) Check your phone supports eSIM (Settings > Cellular/Mobile on iPhone). 2) Purchase a plan from an eSIM provider for your destination. 3) Scan the QR code or download the profile. 4) The eSIM appears as a second line on your phone. 5) When you arrive at your destination, enable the eSIM for data. Your home SIM stays active for calls and texts (though you may want to disable data on it to avoid roaming charges). The entire setup takes 5 minutes.
eSIMs win on convenience (no physical card to buy or insert) and can be purchased before you arrive. Physical SIMs are sometimes cheaper for extended stays and work on older phones. Carrier roaming is the most expensive option by far — international data roaming charges from US carriers range from $10-15/day. A 7-day eSIM plan costing $5-15 replaces $70-105 in roaming charges. The choice is clear for most travelers.
Install and test your eSIM before leaving home (you can activate it while on Wi-Fi). Download offline maps on Google Maps for your destination. Set your eSIM as the data line and your home SIM as the voice/text line. Disable data on your home SIM to prevent accidental roaming charges. For extended travel across multiple countries, regional eSIMs (e.g., 'Europe' or 'Asia') are cheaper than buying per-country plans. Keep your eSIM provider's app installed for checking data balance and buying top-ups.
Put these insights into action — compare prices from 100+ airlines:
eSIMs have made staying connected abroad dramatically simpler and cheaper than traditional roaming or physical SIM cards. Most modern smartphones support them, and you can set up data before you even board your flight.
Prices and coverage vary significantly between providers. Comparing plans on a site like SimTravelGuide before you travel takes five minutes and can save you from overpaying for data you do not need — or worse, running out of data mid-trip.
The best time to apply what you have learned here is on your next flight search. Use the widget above to check prices, set alerts on routes you fly regularly, and see how the strategies in this guide translate to actual savings on your itinerary.
Most modern phones do: all iPhones from XS (2018) onwards, Samsung Galaxy S20 and newer, Google Pixel 3 and newer. Check Settings > Cellular > Add eSIM (iPhone) or Settings > Connections > SIM Manager (Samsung). If the eSIM option appears, your phone supports it.
Travel eSIMs range from $4-30 for 1-10 GB plans lasting 7-30 days. Pricing depends on the destination — European and Asian plans tend to be cheapest. For detailed country-by-country price comparisons, visit SimTravelGuide.com.