If your phone supports eSIM, Saily is simpler for most trips: you set it up at home and it connects when you land. A local physical SIM still makes sense if your phone has no eSIM or you need a local phone number.
The catch: Saily needs an eSIM-compatible, carrier-unlocked phone, and its plans are data only.
The classic way to get data abroad is to buy a local SIM card at the airport and swap it into your phone. An eSIM like Saily does the same job digitally, before you leave home. Here is how the two compare, and when each one is the better choice.
eSIM vs physical SIM: the basics
Both do the same thing: they connect your phone to a mobile network. The differences, as Saily’s help center lists them:
- Form: a physical SIM is a removable plastic card. An eSIM is a digital SIM built into your phone.
- Installation: a physical SIM goes in the SIM tray. An eSIM installs digitally, from an app or a QR code.
- Moving phones: a physical SIM moves between phones easily. An eSIM has to be deleted from one phone before you install it on another.
- Dual SIM: an eSIM leaves the SIM tray free, so many phones can run your home SIM and a travel eSIM together.
- Signal and battery: Saily says eSIMs get the same signal strength as physical SIMs and don’t drain the battery any differently.
Saily vs a local SIM from the airport
| Feature | Saily eSIM | Local SIM at the airport |
|---|---|---|
| When you buy | At home, up to 180 days before you activate | After you land, at a shop or kiosk |
| Setup | Install in the Saily app, turn on data roaming | Swap the card into your SIM tray |
| Your home SIM | Stays in place on dual-SIM phones | Comes out, unless your phone has two slots |
| Local phone number | No (optional US number add-on) | Often included, depending on the carrier |
| Several countries | One eSIM; add plans or a regional plan | Usually a new SIM in each country |
| Price | Shown before you buy | Varies by country, carrier and shop |
When Saily is the better choice
- You want data the moment you land. You install the plan before you fly, so there’s no hunt for a SIM shop in the arrivals hall.
- You need your home number. On a dual-SIM phone your primary number can still receive calls and texts. Your carrier may charge roaming fees for calls.
- You’re visiting more than one country. Saily’s Europe plan covers 35 countries from $4.99, and the Global plan covers 121 destinations from $8.99.
- You run low on data. You can top up in the app, or turn on auto top-up.
- You change your plans. If the eSIM isn’t installed and the plan isn’t activated, you can ask for a full refund within 30 days.
One country needs extra care: Saily’s website and top-up options don’t work inside Turkey, so buy and activate your plan before you get there. See our Saily Turkey review.
When a physical SIM is the better choice
- Your phone doesn’t support eSIM. A local SIM card works in any unlocked phone with a SIM tray. Saily also suggests a third option: a physical eSIM.me card that lets older phones download eSIM profiles, after which you contact Saily support for the QR code.
- You need a local number for calls and texts with local people and businesses.
- You swap phones often, since a card moves between devices in seconds.
How to set up Saily before you travel
- Check that your phone supports eSIM and is carrier-unlocked, then install the Saily app.
- Buy your plan and install the eSIM from the app while you’re on Wi-Fi.
- Turn on data roaming for the Saily eSIM in your phone settings.
- When you land, turn off your home SIM’s data to avoid roaming charges. The plan activates automatically.
Full walkthrough: how to install Saily eSIM.
Which should you pick?
- Short trips and city breaks: Saily. It takes no time at the airport.
- Multi-country trips: Saily, with one regional or Global plan.
- An older phone without eSIM: a local SIM, or the eSIM.me card route.
- A long stay where you need a local number: a local SIM from a carrier.
New to Saily? Start with our Saily eSIM review.
- Set up at home, online when you land
- Keep your home SIM for calls and texts
- One eSIM for many countries
- Refund if not installed or activated
- Needs an eSIM-ready, unlocked phone
- No local number
- An eSIM is harder to move to a new phone than a card
FAQ
Is an eSIM better than a physical SIM for travel?
For most travelers with an eSIM-ready phone, yes. You set it up before the trip and keep your home SIM in place. A physical SIM is better if your phone lacks eSIM or you need a local number.
Does an eSIM drain the battery faster?
Saily says no. eSIMs have the same signal strength as physical SIMs and don’t use the battery any differently.
Can I use Saily if my phone doesn’t support eSIM?
Yes, with a physical eSIM.me card in place of your regular SIM. It lets the phone download eSIM profiles. Contact Saily support for the QR code to finish setup.
Can I keep my physical SIM while using Saily?
Yes. On a dual-SIM phone your home SIM stays active for calls and texts, while Saily handles data.
Saily plans from $3.99 for 1 GB (7 days) in Spain, checked on saily.com on 24 Oct 2026.