What is an eSIM?
An eSIM (embedded SIM) is a digital SIM that, unlike traditional SIM cards, is built directly into your smartphone. This technology allows you to activate a mobile data plan without physically inserting a SIM card into your device.
Unlike physical SIMs, an eSIM can be remotely programmed. All you have to do is scan the QR code you receive by email immediately after your purchase to install it on your phone.
eSIM vs physical SIM: key differences
- Physical SIM: must be manually inserted into the phone, can be lost or damaged, and only connects to the network of the operator that issued it.
- eSIM: can be purchased online in just a few clicks and is available instantly. It takes up no space, can’t be lost or broken, and you can install more than one on your device (great if you’re visiting multiple destinations on one trip).
Advantages of eSIMs
Some next-generation smartphones are even phasing out physical SIMs completely in favor of eSIMs. While this shift is still in progress, the technology already offers huge benefits for travelers, including:
- Instant activation and flexibility
Once purchased and installed, your eSIM is ready to go in just a few clicks. You can also connect to multiple networks using a single eSIM, depending on the agreements your provider has in place. - Save money on roaming
With an eSIM, you can connect directly to local networks in the countries you visit, bypassing your home operator and avoiding expensive roaming charges. - No risk of damage or loss
You don’t have to swap your physical SIM card anymore, which means there’s no risk of losing or damaging it. eSIMs also aren’t subject to physical wear and tear, and if you run into an issue, you can just contact online support. - More sustainable
You no longer need to buy a new plastic SIM card for every country you visit, reducing waste, especially for short-term trips.
Disadvantages of eSIMs
Can a tech this innovative have drawbacks? Just a few, but they’re worth knowing:
- Compatibility isn’t universal
Not all devices support eSIM technology. Be sure to check compatibility on our dedicated page before purchasing. - Transferring can be tricky
While moving a physical SIM from one device to another is easy, transferring an eSIM can be more complex and may require a new QR code. - Internet connection required
To choose and install an eSIM, you’ll need an internet connection. Once it’s installed, though, you don’t need to be online to activate it.
eSIMs from eSIM.sm for travelers
Virtual SIM cards are the ideal solution for frequent flyers or digital nomads.
They let you access local data networks in the countries you visit right away, no need to find a store abroad or waste time in line. And you won’t have to worry about the roaming fees charged by your regular operator.
At eSIM.sm, we specialize in international eSIMs designed to make your travel life easier. Wondering why so many travelers choose us over the competition?
Why choose eSIM.sm
- Coverage in over 190 countries worldwide
- Competitive prices and pay-per-use global data plans
- Simple, user-friendly interface to monitor usage and top up in just a few clicks
- 24/7 multilingual customer support
- Compatible with the latest smartphones, including:
– iPhone XR and newer
– Samsung Galaxy S20 and newer
– Google Pixel 3 and newer
– Huawei P40, Xiaomi 12T Pro, Redmi Note 13 Pro and more
Check full compatibility on our website
How to activate an eSIM with eSIM.sm
Buying and activating an eSIM with eSIM.sm is easy, it takes just a couple of minutes!
- Choose your destination
Visit the page for the country you’re traveling to and explore the available data plans. Choose the one that fits your needs, starting from just 1GB. Complete your purchase. - Install the eSIM
Right after payment, you’ll receive a QR code via email. Scan it with your device to install your eSIM. If scanning isn’t an option, you’ll also get manual installation instructions via email. - Activate and start browsing
When you arrive at your destination, just activate your eSIM and enable roaming on your new data plan to get online instantly.

Frequently asked questions about eSIMs
Are eSIMs safe?
Yes. eSIMs are just as secure as physical SIMs, with the added benefit of remote control and easy management.
Can I use an eSIM on my old phone?
It depends. Check whether your device supports eSIMs. As a general rule, most newer smartphones do.
What happens to my eSIM if I change phones?
That depends on your provider. Some allow you to transfer the eSIM, while others may require you to activate a new one on your new device.
Conclusion
The eSIM is transforming the way we stay connected while traveling. It’s convenient, fast, secure, and often cheaper than traditional options.
But if you don’t opt for an unlimited data plan or our Global eSIM, make sure you know how to save data while abroad to avoid running out of gigabytes.