eSIM Explained: What is eSIM, and How Does It Work?

eSIMs have changed the way we connect to the internet on our phones. We used to juggle multiple physical SIM cards, but eSIMs offer a digital approach that works seamlessly.

Whether you're looking for a simple installation, need to manage international roaming, or want to handle multiple plans on a single device, eSIM technology enables you to connect to a mobile network with just a few taps on your device.

What is an eSIM and how does it work?

An eSIM (embedded SIM) allows your phone to connect to a mobile carrier without needing a physical SIM card. Once activated, the eSIM functions just like a physical SIM card, except it’s managed digitally.

However, not all mobile phones are equipped with eSIM technology. Most current phone models have eSIM capabilities, but you should confirm this before attempting to use an eSIM.

You also need an unlocked phone to use an eSIM — meaning that your phone isn't restricted to your primary carrier's network. A locked phone will prevent you from using eSIMs from outside providers.

There are several eSIM providers available. Some are focused on international SIMs for traveling, while others are for general use. You just need to find the best eSIM option for you, and then install it on your phone.

Why would someone use an eSIM?

eSIMs provide a convenient and instant way to use a mobile carrier without the hassle of getting a physical SIM card. Many people use eSIMs as their primary phone service. However, other people use eSIMs to add lines to their phone without losing their primary service.

Here are a few reasons why people choose an eSIM:

• Convenience: Since no physical card needs to be delivered, you can use your phone faster. There's also no risk of losing or damaging your SIM.
• Flexibility for multiple lines: With eSIMs, you can switch between domestic and international lines. You could also have separate eSIMs for personal and business use. You can easily switch between eSIMs without needing to swap physical SIM cards.
• International travel: eSIMs simplify connecting to local phone networks in different countries. No need to search for a physical SIM card, you can just instantly connect and use data immediately. It's ideal for avoiding your primary carrier’s high roaming charges.

eSIM vs. physical SIM card

A physical SIM card is a small, square card that connects your phone to data, calling, and texting services. You may need to order it, wait for it to arrive, and then install it.

An eSIM is a newer technology that manages SIM cards digitally. It's a built-in microchip on your phone. Since it's already built in, you can start using a new eSIM as soon as you purchase it.

The eSIM design makes it more secure than a physical SIM card since thieves can't remove the eSIM. Some eSIM providers include additional security features such as a built-in ad blocker and web protection.

Is having an eSIM a good idea?

eSIMs provide convenience and flexibility in connecting to a phone network. Some additional benefits include:

• Easier to manage multiple plans on one device
• Faster setup with digital installation and activation
• Can't lose or damage eSIMs

However, eSIMs do have some drawbacks. While not dealbreakers, they are something to consider when choosing a SIM card.

Some of the main disadvantages of using an eSIM are that it's hard to troubleshoot. You can't swap out an eSIM with a new one since it's embedded in the device. You'll most likely need to contact customer service if you run into issues.

There's also a lack of universal standards with eSIMs. Some mobile devices don't have eSIM technology. Likewise, some carriers may prevent you from using an eSIM outside of their phone network.

Your ability to use an eSIM will vary depending on the device and phone carrier.

eSIM pros and cons

How to activate an eSIM for the first time

Activating an eSIM for the first time will depend on the provider. Generally speaking, you'll need to download the eSIM provider's app.

Some apps can automatically install the eSIM, but you may need to follow the instructions to install it manually. The manual process typically involves scanning a QR code or entering an activation code provided by the eSIM provider.

After installation, you may need to activate the eSIM yourself. Go into your phone's settings, navigate to SIMs, and turn on the eSIM to start the service. If you're using the eSIM for an international trip, you may need to wait and activate it once you arrive at your destination.

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Bottom line

There are several benefits to using eSIMs. An eSIM is quicker to install, since you don't need to wait for a physical card to arrive. You can also manage multiple SIMs seamlessly with a couple of taps — no need for physical SIM swapping.

Additionally, eSIMs also allow you to connect to local networks when traveling abroad. An eSIM makes it easier to stay connected without having to wait in line at the airport for a local SIM card. That means you can enjoy your international trip as soon as you arrive.

Don't forget to turn on a VPN for travel, which can help protect your privacy while you're away from home.