eSIM: What is it, and how does it work?
An eSIM is a digital SIM that's built into most modern phones. It works like a physical SIM card, but without having to insert anything into your device. eSIMs offer tons of benefits, such as helping you avoid roaming fees and making it easy to switch between providers.
Choose Your DestinationWhat is an eSIM?
An eSIM is an embedded subscriber identity module — essentially, a built-in chip in your phone. It does everything a traditional SIM would do, but without having to slot a tiny card into your phone. Additionally, an eSIM allows you to use several carriers and phone numbers at once, which is super convenient.
eSIMs are available on smartphones, tablets, smartwatches, and even some cars! They're great for quickly switching between phone numbers and grabbing mobile data for travel.
How does an eSIM work?
Choose a plan
Select the destination you're heading to and choose a data plan that fits your needs.
Install eSIM
Follow the simple setup steps on your device. No physical card needed!
Get connected
Your plan activates when you arrive at your destination. Enjoy seamless connectivity!
eSIM advantages
No high roaming fees
Travelers can buy eSIMs that connect them to local carriers and avoid unexpected roaming fees.
Multiple profiles
You can have multiple virtual eSIMs on one device, making it easy to switch between different carriers and phone numbers.
Pay for what you need
Going to Japan for a week? Get a 7-day plan instead of monthly, and save money for more experiences.
Saves space
The absence of a physical SIM card slot frees up space for other device upgrades like a bigger battery.
Can't get lost or stolen
Swapping out tiny SIM cards is tricky, especially on the move. An eSIM is built in, so it won't get lost.
Less waste
Getting a newly packaged SIM card for every trip adds up over time. Use an eSIM instead.
eSIM vs Physical SIM
The main difference between an eSIM and a traditional SIM card is that an eSIM is digital while a SIM card is a physical chip.
| Feature | eSIM | SIM |
|---|---|---|
| Phone numbers | Up to two* | Up to two |
| Network Operators | As many as you like | Up to two |
| Removal | Deactivate the profile | Remove the SIM card |
| Activation | Manual or automatic | Manual (insert card) |
| Compatibility | Newer devices | Most devices |
| Using abroad | Affordable | May be expensive |
* co:sim offers two product lines: ONE card (data in 200+ destinations, PAYG or data packages) and Data Only (fixed data plans for travelers).