How eSIM Technology Made Communications Affordable

SIM cards, although inconspicuous, are indispensable components of our mobile devices. The eSIM (embedded SIM) technology is gradually replacing the usual plastic cards, wanting to change our approach to mobile communication. Let’s find out why the technology is attracting such interest and how to buy eSIM to change the way you think about mobile communication forever.

What is an eSIM?

An eSIM is an in-built subscriber identification module, which is a tiny chip integrated directly into the device. Unlike classic SIM cards, it cannot be physically removed or replaced. Instead, the information on it can be customised online.

History and Evolution

• First steps (2010): The technology debuted in the world of consumer devices, finding applications in smart watches, connected cars, and other IoT devices. Early implementations allowed manufacturers to create smaller and more water-resistant devices, which was especially important for wearable electronics.
• Smartphone breakthrough (2017): Google Pixel 2 became the first eSIM-enabled smartphone, ushering in a new era in mobile connectivity.
• The complete abandonment of physical cards (2019): The release of the Motorola Razr marked the first smartphone to work exclusively with inbuilt SIMs.
• Mass adoption (2024): Apple, Samsung, and other market leaders began mass equipping their new devices with eSIM support, making this technology standard on most smartphones.

How Does an eSIM Function?

The eSIM is a tiny chip embedded in the device’s motherboard. It contains all the information needed to identify the subscriber on the network. Inside the chip is a secure memory area where carrier profiles are stored. Each profile includes a unique subscriber identifier (IMSI), encryption keys for secure communications, and other parameters required to operate in a specific operator’s environment.

The processor manages these profiles, allowing the right one to be activated depending on the user’s choice or the current location of the device. Importantly, eSIM is compliant with the standard developed by the GSMA (GSM Association), ensuring compatibility between different devices and providers. This allows a single protocol to be used for remote download and management of operator profiles, and the process of changing provider becomes as simple and secure as possible for the user.

Key Benefits of Use

The new format has not just completely changed the way we think about SIM cards, but has also introduced many different advantages. Let’s look at some of them together.

Ease of use

Forget about finding a special needle to remove the SIM card! With integrated cards, the process of connecting to the operator’s network becomes easier:

• Scanning the QR code
• Activation via the operator’s app
• Using the quick transfer function (e.g. Apple’s eSIM Quick Transfer).

The eSIM is especially convenient for travellers. Now there is no need to search for a local operator and buy a physical SIM card upon arrival in a new country. Simply download a local operator profile in advance or use global eSIM providers that offer country-specific packages.

Increased security

The eSIM offers a number of security advantages:

• Impossibility of physical extraction and cloning
• Hardware-based data encryption
• Additional security protocols for remote updates

It is important to note that eSIM uses special cryptographic algorithms to protect user data. Each profile change operation requires confirmation with unique keys, making unauthorised access to information virtually impossible.

Space saving

Not needing a physical SIM card slot allows manufacturers to optimise the internal space of devices. This opens up opportunities to:

• Increase battery capacity
• Add new features
• Create thinner and more compact devices

For example, in smartphones, the freed up space can be used to add additional sensors, more powerful speakers or more memory. In wearable devices such as smart watches, saving space is especially critical and allows for more elegant and functional models.

Flexible operator selection

Built-in cards allow you to store multiple operator profiles at the same time, opening up a range of possibilities:

• Easy switching between operators without replacing the physical card
• Use different numbers for work and personal life on the same device
• Quickly connect to local operators when travelling

In addition, some operators have started offering free trial periods with the eSIM. This allows users to test the connection quality of a new operator without having to give up their current one, making it much easier to choose the most suitable provider.

How to Buy an eSIM with ESIM-Man?

Make sure your device is compatible with virtual SIM cards or eSIM. You can confirm this by checking the technical specifications on your smartphone’s manufacturer website. To purchase an eSIM, follow these steps:

1. Open and sign up in the “ESIM-Man” web app through the official website: https://esim-man.com/.
2. Log in using any internet-connected device, no matter where you are.
3. In the search bar on the homepage, enter your travel destination. You’ll see a list of available data plans. Select the one that fits your needs and click “Buy Now.”

After that, just download and install the eSIM by scanning the provided QR code.