What is eSIM, and how does it work?

With the increasing demand for seamless connectivity, eSIM technology is revolutionizing the way we use mobile networks. Whether you're a frequent traveler or simply looking for a more flexible and efficient mobile solution, eSIMs offer unparalleled convenience.

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What Is an eSIM?

An eSIM (Embedded Subscriber Identity Module) is a built-in chip within your device that functions just like a traditional SIM card but without the need for physical insertion. It allows you to use multiple carriers and phone numbers on the same device, making it incredibly convenient for users who travel frequently or need dual connectivity.

eSIM technology extends beyond smartphones—it's also available in tablets, smartwatches, and even some cars, enabling seamless connectivity across various devices. With an eSIM, switching between mobile networks and accessing international data plans becomes faster and more efficient.

How Does an eSIM Work?

An eSIM operates using embedded hardware within your device and does not rely on preinstalled software to function. Once activated, it connects your phone to a mobile network, allowing you to make calls, send messages, and use mobile data just as you would with a standard SIM card.

Most modern smartphones come with built-in eSIM support, but it’s always a good idea to check your device’s compatibility before purchasing an eSIM plan. Instead of physically inserting or swapping SIM cards, eSIM technology enables users to store multiple carrier profiles on a single device, making it easier than ever to switch networks on the go.

To begin using an eSIM, simply purchase an eSIM plan from a provider and complete a quick setup. Your existing SIM card can remain in the phone, so you can use both simultaneously if your device supports dual SIM functionality. This flexibility is particularly useful for frequent travelers who need local data plans while keeping their primary number active.

What Is the Difference Between an eSIM and a Physical SIM?

Feature eSIM Physical 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 (plan activates at your destination) Manual (need to insert a card into your device)
Compatibility Newer devices only Old and most new devices
Using Abroad Affordable — easy to get data plans for different countries May be expensive due to roaming

How to Install an eSIM on iPhone

Activating an eSIM on an iPhone is a straightforward process. Follow these steps:

Step-by-Step Guide for iPhone:

  1. Ensure your iPhone supports eSIM (see the compatibility check section below).
  2. Obtain an eSIM activation QR code from your carrier or provider.
  3. Go to Settings > Cellular > Add Cellular Plan.
  4. Scan the QR code provided by your carrier.
  5. Follow the on-screen instructions to complete the activation.
  6. Your eSIM is now ready to use.
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How to Install an eSIM on Android

The process of setting up an eSIM on Android varies slightly depending on the manufacturer, but the general steps are as follows:

Step-by-Step Guide for Android:

  1. Check if your Android device supports eSIM (refer to the compatibility section below).
  2. Get an eSIM activation QR code from your carrier.
  3. Open Settings > Connections > SIM Card Manager (on Samsung) or Network & Internet (on Google Pixel and other brands).
  4. Select Add eSIM or Mobile Network > Download a SIM instead.
  5. Scan the QR code and follow the instructions.
  6. The eSIM will be activated and ready for use.
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How to Check If Your Device Supports eSIM?

Before activating an eSIM, it’s essential to confirm whether your device supports this technology.

For Apple Devices:

  • OPEN the Settings app, then TAP General.
  • TAP About.
  • TAP the Model Number until it changes to an AXXXX combination.
  • VERIFY that the Model Number of your iPhone does not originate from a Chinese region. The information can be found in this link.
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For Android Devices:

  • OPEN the Settings app, then TAP Connections.
  • TAP SIM Manager.
  • If Add eSIM is available, your device likely supports eSIMs.
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Final Thoughts

eSIM technology is transforming mobile connectivity by offering a convenient and flexible alternative to traditional SIM cards. Whether you're a traveler or looking for dual SIM capabilities, eSIM provides an easy way to switch networks without changing physical SIM cards.

For the best and most affordable eSIM plans, check out Simfinity Live and stay connected worldwide!

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