How eSIM Works and Why You Need One
Let’s be honest—traditional SIM cards are a hassle. You either have to dig around for a paper clip to swap them, risk losing them because they’re tiny, or deal with carrier stores when you just want to get online. Enter eSIM, the modern solution that eliminates all that frustration. But how does eSIM work, and why should you care?
Let’s break it down in the simplest way possible.
What is an eSIM?
An eSIM (short for “embedded SIM”) is exactly what it sounds like—a SIM card that’s built into your device. Unlike a physical SIM card that you insert into a slot, an eSIM is a small chip soldered directly into your smartphone, smartwatch, tablet, or even some laptops.
But here’s the magic: It works just like a traditional SIM card. It connects you to a mobile network, allows you to make calls, send texts, and use data. The big difference? You don’t have to physically swap it out. Instead, you activate and manage it digitally.
How does eSIM work?
Think of an eSIM like a virtual SIM card. Instead of going to a store, buying a SIM card, and inserting it into your phone, you can activate an eSIM by scanning a QR code or downloading a carrier profile.
Here’s the basic process:
- Choose a carrier – Many mobile carriers now support eSIM. You can check your options online or directly from your phone’s settings.
- Get a QR code or activation details – Your carrier will provide a QR code (or an activation code) that links your device to their network.
- Activate it on your phone – Go to your phone settings, scan the QR code, or enter the details manually.
- Boom! You’re connected – Just like that, your phone now has mobile service—no plastic SIM card required.
It’s that simple.
Why is eSIM a game-changer?
Now that you know how it works, let’s talk about why eSIM is a big deal.
1. No More Physical SIM Cards
The struggle of swapping tiny SIM cards is over. You can switch between carriers in minutes without needing a new piece of plastic.
2. Easier for Travelers
If you travel often, you know how annoying it is to buy a local SIM card, swap it in, and store your main SIM safely. With eSIM, you can just add a travel data plan instantly and stay connected.
3. Multiple Numbers on One Device
Many eSIM-supported phones let you store multiple eSIM profiles. You could have your personal number, a work number, and a travel SIM all on the same device—no more carrying two phones!
4. Better Security
Since eSIMs are built into your device, they can’t be stolen or swapped out like traditional SIM cards. This makes them more secure against fraud and identity theft.
5. Environmentally Friendly
No plastic SIM cards, no unnecessary packaging, no waste. Going digital is better for the planet.
What Devices Support eSIM?
eSIM is becoming more common, but not every phone or device has it yet. Here are some major ones that do:
Smartphones:
- Apple iPhones (iPhone XR and newer)
- Google Pixel (Pixel 3 and newer)
- Samsung Galaxy (S20 and newer, some Note models, Z Flip and Fold series)
Tablets:
- iPads (iPad Pro, Air, and newer models)
Smartwatches:
- Apple Watch (Series 3 and newer)
- Samsung Galaxy Watch (LTE models)
Laptops:
- Some newer models of Windows laptops and Apple’s MacBook with cellular connectivity options
Before buying a device, check if it supports eSIM, especially if you plan to use it for international travel or business.
Can You Use eSIM and a Physical SIM Together?
Yes! Many devices support dual SIM functionality, meaning you can have one physical SIM card and one eSIM active at the same time. This is perfect if you want to:
- Keep your personal number on a physical SIM while using an eSIM for work.
- Use your home country’s SIM for calls and an eSIM for cheap international data when traveling.
Most phones let you choose which SIM to use for calls, texts, and data separately, giving you total control over your connectivity.
How to Get an eSIM?
Getting an eSIM is easier than you think. Here’s how:
Option 1: From Your Carrier
Many major mobile carriers now offer eSIM plans. You can request one online or visit a store. They’ll give you a QR code or an activation code to set it up.
Option 2: Buy an eSIM Online
For travel, companies like BNESIM, Airhub, and Ubigi offer eSIM data plans. You can purchase and activate them instantly—perfect if you land in a new country and need data ASAP. Some of the best eSIM providers can be found here.
Option 3: Use an App
Some mobile providers let you download an eSIM directly through their app, making it even easier to set up.
Want to Try eSIM for Free?
Good news! We’re giving away a global eSIM with 1GB of data, valid in 80+ countries for 2 years—completely free! To get yours, simply:
- Download the Eskimo.travel app,
- enter the code ALERTIFY,
- and you’re good to go.
No strings attached—just a free eSIM to experience the future of mobile connectivity.
Are There Any Downsides to eSIM?
While eSIM is fantastic, it’s not perfect (yet). Here are a few things to keep in mind:
- Not All Carriers Support eSIM – Although eSIM adoption is growing, some smaller carriers and prepaid plans still don’t support it.
- Not Every Phone Has It – If you have an older device, you might need to stick with a physical SIM.
- Switching Devices Can Be Tricky – Unlike swapping a SIM card, moving your eSIM from one phone to another can take a few extra steps, depending on the carrier.
But as eSIM becomes the standard, these issues are likely to disappear.
Final Thoughts: Is eSIM the Future?
Absolutely. eSIM is more convenient, secure, and flexible than traditional SIM cards. It’s already making life easier for travelers, business users, and tech-savvy consumers. As more carriers and devices adopt eSIM, we’re moving toward a world where physical SIM cards become obsolete.
If you haven’t tried eSIM yet, it’s worth checking if your device supports it. Once you experience the ease of activating a plan in minutes—without fumbling with a tiny SIM card—you might never go back.
Do you have any questions about eSIM and how does eSIM work? Drop them in the comments—I’d love to help!
