Common eSIM FAQs: What is an eSIM and How Does It Work?

We know that navigating new technology like eSIMs can be confusing, especially if you're trying to figure it all out before a trip. Don't worry—you’re not alone!

Whether you're unsure about how an embedded SIM works, how to set it up, or if your phone even supports it, we’re here to help make things simple.

In this FAQ blog, we’ll walk you through the most common questions people have about eSIMs and why KnowRoaming is the best choice for staying connected globally.

eSIM Explanation:

An embedded SIM is a small chip inside your phone. It helps your phone connect to mobile networks. You do not need a physical SIM card. If your phone supports eSIMs, you can download network information directly to your device.

You don't need a regular SIM card when you travel. Your eSIM provides your phone with the local network data it needs to connect.

Once you've purchased an eSIM plan, the network data is downloaded to your phone. This allows you to connect to local networks in the country or region you're visiting. It’s a simple and hassle-free way to stay connected, especially when traveling. No more swapping SIM cards—just install, activate, and you're good to go!

What Are the Benefits of Using an eSIM?

How Do I Buy an eSIM?

The steps are simple via our App and www.KnowRoaming.com. See this link for an in-depth guide:

How To Buy and Install eSIMs for Travellers

How Do I Activate an eSIM?

Activating an eSIM is simple. Once you purchase an eSIM from KnowRoaming, you’ll receive a QR code via email. Scan the code using your device, follow the prompts, and you’re ready to go! For step-by-step installation instructions, check out this link for installation guides.

How Long Does an eSIM Take to Activate?

An eSIM typically takes just a few minutes to activate.

Once you scan the QR code and follow the setup steps, your eSIM will be ready to use. However, activation will only take effect once you're within the eligible country or region for your package.

Should I Install My eSIM Before Travelling?

It’s best to install your eSIM before you travel, as you will need a stable internet connection. However, if you prefer, you can activate it once you land using Wi-Fi. Either way, the data plan won’t start until you’re in the country or region covered by your package.

Is an eSIM Permanent?

An eSIM is linked to your device. It can only be installed once on a specific phone. If you delete or remove it, it cannot be reinstalled. This makes it essential to install the eSIM on the device you’ll use during your travels.

Can I Use Both SIM and eSIM?

Yes! Many phones support both a physical SIM card and an eSIM at the same time.

This dual-SIM setup is perfect for travelers who want to keep their local number active while using an eSIM for mobile data abroad.

Can I Use WhatsApp with an eSIM?

Absolutely! You can use WhatsApp, Skype, FaceTime, and other VoIP services with your eSIM.

Even though eSIMs are typically data-only, you can still make calls and send messages using apps that rely on mobile data or Wi-Fi.

Does My Phone Support eSIM?

Most newer smartphones are eSIM-compatible, including iPhones, Google Pixel devices, and many Android phones. To find out if your phone supports eSIM, check out our eSIM Compatible Phones: A Comprehensive Guide.

Who Is The Best eSIM Provider?

KnowRoaming stands out from other eSIM providers because we offer:

Is an eSIM Better Than a Physical SIM?

Yes! Here’s why:

For more information on how eSIMs compare to physical SIM cards, check out our eSIM vs Physical SIM Comparison.

Can I Use My eSIM for International Travel?

Yes! eSIMs are perfect for international travel because they allow you to switch to local networks in each country. You can even buy regional or global eSIM packages that work across multiple countries.

What Do I Do If My eSIM Isn’t Working?

If your eSIM isn’t working, don’t worry! We’ve got an eSIM Troubleshooting guide to help you. Follow the steps in our guide: My eSIM Isn’t Working… What Should I Do?

For further help, reach out to our 24/7 customer support team for assistance.

How Do I Top-Up My eSIM?

Running out of data? No problem! You can easily top up your eSIM with more data by following our guide: How to Top-Up Your eSIM

Simply log in to your KnowRoaming account, choose the top-up package, and you’re ready to go!

How Many eSIMs Can I Have?

You can have multiple eSIM profiles stored on your phone. However you can only use one at a time (or two in dual-SIM supported devices).

This is great if you travel frequently and need eSIMs for different countries or regions. With KnowRoaming you can get a Country Specific, Regional or Global eSIM.

Does eSIM work without an internet connection?

Your eSIM will connect to mobile data networks without needing Wi-Fi once it’s activated.

To install or activate an eSIM for the first time, you need an internet connection. This can be Wi-Fi or mobile data. You will use it to download the network profile to your device.

How much data do I get with an eSIM?

The amount of data you get depends on the eSIM plan you choose. KnowRoaming offers a range of options, from small packages for light use to larger data bundles for heavy users or longer trips. You can check and purchase the data packages that suit your needs directly on our website.

Can I use an eSIM while flying?

Most airlines don’t allow cellular connections while in the air. However, you can still use your eSIM before takeoff and after landing, as long as you're in a covered region or country.

Can I transfer my eSIM to a new phone?

Most eSIMs can only be installed once, and they are tied to the device they are downloaded onto. This means you can’t move the same eSIM to a new phone. If you're getting a new device, you will need to purchase and download a new eSIM plan for the new phone.

Can I cancel my eSIM plan?

Yes, most eSIM plans are flexible. If you no longer need the plan, you can stop using it once the data or the validity period runs out. However, once an eSIM is activated, you cannot get a refund for any unused data, so make sure to choose a plan that fits your needs.

Will my eSIM work if I cross borders?

Yes, if you have a regional or global eSIM plan from KnowRoaming, your eSIM will automatically connect to the local network when you enter a new country within your plan's coverage. There’s no need to re-install or change any settings—you’ll stay connected as long as your package covers that region.

Got More eSIM Questions?

Contact our support team, who are available 24/7.