What exactly is an eSIM?
An eSIM is a digital SIM card built into your phone. Instead of popping in a tiny plastic card, you scan a QR code and your phone downloads the carrier profile. It takes about 2 minutes from scan to connected.
Think of it like downloading an app versus buying a physical CD. Same result, just faster and without the hassle of finding the right size SIM or hunting for that tiny ejector pin.
Does your phone support eSIM?
Most phones made after 2020 support eSIM. The full list includes iPhone XS and newer, Samsung Galaxy S20 and newer, Google Pixel 3 and newer, and most flagship Android phones. Your phone also needs to be carrier-unlocked. If you bought it outright or finished paying off your contract, it should be unlocked. Not sure? Check our compatibility guide for step-by-step instructions.
When should you buy your eSIM?
Buy it anytime before your trip. You can purchase the plan weeks in advance. The data timer doesn't start when you buy it. It starts when you first connect to a network at your destination. So there's zero rush and zero waste.
We recommend scanning and installing the QR code while you still have WiFi at home. That way you land ready to go with no setup needed at the airport.
What happens to your regular phone number?
Nothing. Your existing SIM stays active. Modern phones run both SIMs simultaneously. Your home number rings normally for calls and texts. The eSIM handles your data connection at local rates. You don't lose anything by adding an eSIM.
How is this different from buying a local SIM?
A local SIM means finding a shop at the airport or in the city, possibly waiting in line, handing over your passport (some countries require it), and swapping out your current SIM card. If your phone doesn't have a dual-SIM tray, removing your home SIM means you can't receive calls or texts on your regular number.
An eSIM eliminates all of that. You buy it online from your couch, scan a QR code, and your phone is ready before you even get to the airport. Both your home SIM and the eSIM work simultaneously, so nothing gets interrupted.
Local SIMs can be slightly cheaper in some countries, but the convenience gap is significant - especially when you're tired after a long flight and just want to get a taxi to your hotel.
Will my eSIM work in Airplane Mode?
No. Airplane Mode disables all cellular connections, including eSIM. But here's a useful trick: you can enable Airplane Mode and then manually turn cellular back on while keeping WiFi and Bluetooth off. Some travelers do this to save battery during flights and then selectively enable cellular when they land.
Can I reuse an eSIM?
It depends on the plan. Some eSIM profiles are one-time use - once you delete them from your phone, the QR code won't work again. Others can be reinstalled. Check your provider's terms before deleting an eSIM profile, especially if you have unused data remaining.
If you're visiting the same country regularly, look for longer-validity plans. A 30 or 90-day plan that you keep installed between trips is more convenient than buying a new one each time.
How fast is eSIM data?
eSIM data runs on the same networks as local SIM cards. If the local network is 4G LTE, your eSIM connects at 4G LTE speeds. You're not getting a slower or degraded connection because it's an eSIM - the technology is identical from a network perspective. In practice, most travelers see download speeds of 20-50 Mbps on 4G, which is more than enough for everything except heavy streaming.
What if something goes wrong?
The most common issue is forgetting to turn on Data Roaming for the eSIM line. It's off by default on most phones, and without it, the eSIM won't connect to foreign networks. A quick trip to settings fixes it. Check our troubleshooting guide for other common fixes.
If you run into problems, don't panic. Most issues are solved by toggling Airplane Mode on and off, which forces your phone to reconnect to available networks. It takes 15 seconds and fixes about 80% of connection problems.
Do I need a different eSIM for each trip?
For different countries, yes - unless you buy a regional or global plan that covers multiple destinations. But you can have multiple eSIM profiles stored on your phone at the same time. iPhone supports 8-10 eSIM profiles (only one active at a time besides your physical SIM). Samsung supports multiple too. So you can keep your Italy eSIM from last trip, add a Japan one for next month, and switch between them as needed. Just delete old expired ones to keep things tidy.
Your first eSIM checklist
- Verify your phone supports eSIM and is carrier-unlocked
- Buy a plan for your destination at getesimonline.com/countries
- Scan the QR code on WiFi before your trip
- Enable Data Roaming on the eSIM line in your phone settings
- Set the eSIM as your primary data line
- Land, wait 1 to 2 minutes, and you're online
That's genuinely it. Six steps, two minutes of actual work, and you've got affordable data the moment you touch down.