eSIM – what is it and how it works
Did you know your phone probably doesn’t need a SIM card? An eSIM can save you money and help you avoid dreaded roaming charges. We’ll explain what eSIMs are and why they’re so handy for travel.
What is an eSIM?
An eSIM stands for embedded SIM (subscriber identity module). It’s a digital version of a traditional SIM card that does everything a physical SIM card would do — but uses a built-in eSIM chip on your device instead. eSIMs are available on smartphones, tablets, smartwatches, and even some cars!
They’re great for using several network operators and up to two phone numbers at the same time — and an excellent short-term solution for travel.
How does an eSIM work?
An eSIM uses a built-in chip and preinstalled software on your device to do what a traditional SIM would — connect you to a network, enable calls, and provide mobile data.
To start using an eSIM, just buy an eSIM plan and complete a quick setup. No need to remove your current SIM card — it can stay where it is, whether you decide to keep using it or not.
How to set up an eSIM
Before buying an eSIM plan, check if your phone is eSIM compatible. Then, follow these steps to get an eSIM plan with Saily.
01
Choose an eSIM data plan for your trip
Select the country of your future destination and choose your data plan.
02
Download the eSIM app
Set up the eSIM on your device by following the instructions in the app.
03
Enjoy your eSIM data plan
Your plan will be activated automatically when you arrive.
Why use an eSIM?
eSIMs are great for many reasons.
Lower roaming charges
An eSIM lets you connect to a local carrier and avoid high roaming fees.
Pay for what you need
Off to Japan for a week? Get a 7-day plan instead of monthly, and save your yen for an extra okonomiyaki.
Less space
If a device doesn’t require a physical SIM card slot, it can be made smaller.
Stay safe online
With an eSIM, you can avoid some cybersecurity risks related to unauthorized SIM card use.
Multiple profiles
An eSIM lets you have several profiles — or “virtual” SIM cards — on one device. You can switch between carriers without swapping physical SIM cards.
Less waste
SIM cards are small but, at the end of the day, it’s still plastic waste that could’ve been avoided.
What is the difference between an eSIM and a physical SIM?
The main difference between physical SIM cards and eSIMs is that you can install and activate an eSIM yourself and it will support multiple network profiles.
eSIM | SIM | |
|---|---|---|
Phone numbers | Up to two (currently, Saily eSIMs don't support phone numbers) | Up to two (if your device supports it) |
Network Operators | Multiple | Up to two (if your device supports it) |
Removal | Deactivate the profile | Remove the SIM card |
Activation | Manual or automatic (plan activates at your destination) | Manual (need to insert a card into your device) |
Compatibility | Newer devices | All old and most new devices |
Using internationally | Affordable — easy to get data plans in different countries | Deal with expensive roaming or buy a new local SIM card |
Profiles | Multiple | Limited profile switching |