What is an eSIM and How Does It Work (Key Benefits) in 2025

What is an eSIM and How Does It Work (Key Benefits) in 2025

If you’ve ever asked questions like “What is an eSIM?”, “How do I use an eSIM card?”, or “how can I set up an eSIM on my iPhone?”

You're not alone.

Plenty of people are also seeking more effortless ways to manage phone service, especially when they switch plans, travel, or need a second line.

If you’ve experienced issues like losing your SIM card, requiring a second number for work, or dealing with expensive roaming fees while traveling, you’re probably looking for something a little more flexible. Here’s where eSIM can come to the rescue.

By 2025, most new smartphones, the latest iPhones and Galaxy models such as the iPhone 14, iPhone 15, and some Samsung Galaxy models such as the Galaxy S29, Z39X, and the Samsung A25, will support eSIM cards.

Indeed, a few handsets in the US don’t even have a physical SIM slot. Rather than inserting a small plastic SIM, your phone connects to a mobile network using an eSIM (embedded SIM) built into the device.

If you're not sure what an eSIM is, how to set one up, or why you'd want one, no problem.

This article breaks everything down in easy-to-follow steps, so that you can determine if an eSIM is the right option for you.

What is an eSIM, and How Do You Get One

An eSIM, or Embedded Subscriber Identity Module, is a virtual SIM card that’s physically built into your phone. It does the same thing a physical SIM does, connecting your device to a mobile network, without needing you to insert anything.

You don’t have to go to a store or wait for a SIM to arrive. All of it is done online, on your phone.

Before you begin, check if your phone supports eSIM. Most new smartphones come equipped with this feature. If your device supports it, you can purchase an eSIM plan online. They could be plans for the day-to-day and for international travel.

After you’ve bought, you’ll typically get a QR code or setup instructions, either by email, inside an app, or in person. Scan the code, or follow the instructions, and you have your eSIM activated in just a couple of minutes. Some providers even offer a free eSIM trial so you can try it out before you commit.

How Do You Set eSIM Up?

Now that you understand what an eSIM is and how to acquire one, next up, you’ll need to set it up. It’s a simple process and easily done from your phone.

Here’s how to do it on iPhone and Android

On iPhone:

1. Open Settings.
2. Tap Cellular or Mobile Data.
3. Select Add eSIM.
4. Pick the option to scan a QR code or the transfer option if you are coming from another iPhone.
5. Follow the on-screen instructions to finish the setup.

On Android:

1. Open Settings.
2. Go to Network & Internet or Connections.
3. Tap SIM cards or the Mobile Network.
4. Choose Add Mobile Plan or Download SIM.
5. Scan the QR code or enter the details manually.

Typically, the setup will only take a couple of minutes. Once added, your eSIM profile links your phone to the network. You can make calls, send messages, and use data in the same way as with a regular SIM.

How Does It Work?

An eSIM is software-based and operates like a physical SIM card inside your phone. When turned on, it links your phone to the usual mobile network for calls, texts, and data.

You don’t have to take your existing SIM out. If your phone is dual SIM, you can switch between both an eSIM and a physical SIM any time you want, making it perfect for trips abroad or if you simply want to have both work and personal phone numbers.

Usually it goes like this:

• Get the app from your eSIM provider.
• Pick a plan when and where you need it.
• Scan or follow the step-by-step instructions on the new eSIM activation card to enable your eSIM or dual SIM-compatible device.
• Turn it on, your phone connects to the network, and you’re off.

Most eSIM plans are data only, but you can still make calls and send text messages through the use of apps. Other devices allow you to create Wi-Fi hotspots to share mobile data, or you can control your plans from a single screen.

Why Is Everyone Talking About eSIM?

For users, the reason to upgrade to an eSIM is the freedom and convenience it delivers. And you won’t have to wait for a physical card to arrive, or visit a store to sign up for one; everything is done through your phone.

eSIM means faster plan switches and an easier time adding a second number. This is great for business travelers, remote workers, or anyone who needs flexible mobile service.

A lot of phones now come with built-in eSIM support, and the number of eSIM plans on offer is only growing. A free eSIM trial is usually offered for you to try out coverage and speed before committing.

What Are the Benefits of Using an eSIM?

There are a handful of good reasons why you might want to use an eSIM, especially if you’re the type of person who likes the freedom, speed, and personal control over mobile service. You don’t even really need a physical SIM card to use a mobile phone service.

• You don’t need a physical SIM card to use a mobile service.
• Setup is quick and can be done directly from your phone.
• You can use two mobile numbers on one device.
• It’s useful for travel because you can connect as soon as you arrive. Best Solo Trip Packages for Unforgettable Solo Travel Adventures make your journey even more rewarding by ensuring you experience new destinations with ease and confidence. You can switch between plans without changing SIM cards.
• Some providers offer a free eSIM trial before you commit.
• There’s no risk of losing or damaging a plastic SIM card.
• eSIMs also work in tablets, smartwatches, and some vehicles.

To Sum Up

We’ve explained what an eSIM is, how to get one, how it works, and why it’s becoming more of a useful option for everyday and travel needs.

You don’t even need to wait for a physical card or visit a store: You can set everything up on your phone in just a few clicks.

We hope that helps answer your questions and makes things clearer.

If you’ve used an eSIM or are planning to shortly, let us know in the comments; it might help someone else make up their mind.

Thanks for reading!