eSIM

A schematic representation of the evolution of SIM card types. Image: Samsung

eSIM (Embedded SIM) stands for “embedded SIM card.” Unlike a traditional SIM, which comes as a tiny piece of plastic, an eSIM is built directly into the device. Why does this matter? Put simply: you’ll never again need to hunt down a spare SIM card when switching carriers — your eSIM handles it all, like a loyal superhero of connectivity.

Where is eSIM Used?

You’ll find eSIM technology in many modern devices: smartphones, smartwatches, and tablets. It’s actively adopted by leading manufacturers like Apple, Samsung, and Google, as well as smaller brands. Mobile carriers around the world are on board, too. At first, eSIM appeared mostly in flagship devices, but it’s steadily making its way into mid-range models as well.

A Quick History

eSIM was developed as part of mobile communication standardization, with support built into the GSMA specification — the global association of mobile operators. The first large-scale rollout happened in 2016, when Apple introduced eSIM in the iPad Pro. Since then, it has spread to devices across many brands, even allowing smartwatches to operate independently of smartphones — all thanks to the built-in SIM.

Advantages of eSIM

• No more plastic hassles.
  Say goodbye to tiny SIM cards that get lost, mixed up, or broken.

• Easy carrier switching.
  A single eSIM-enabled phone can store multiple carrier profiles. Switching providers or plans takes just a few taps — no store visits, no waiting.

• Extra security.
  Because an eSIM is physically embedded, a thief can’t simply remove it and use it in another device to intercept your critical bank or messenger SMS.

• More room inside the device.
  Removing the SIM slot gives manufacturers space for more useful components — like bigger batteries or better cameras.

Drawbacks of eSIM

• Limited availability.
  Not all devices support eSIM yet, and not every carrier worldwide offers it.

• Problems if your phone breaks.
  If your device stops working, your eSIM is locked inside it, which makes restoring service trickier. The old “pop the SIM out and use it in another phone” trick won’t work — you’ll need help from your carrier.

Global Adoption

As of 2024, about 40% of new mobile devices support eSIM. The main markets are the U.S., Europe, and parts of Asia — especially South Korea and Japan — where carriers are actively pushing the technology. In Russia and across the CIS, eSIM adoption is also growing, though it’s still not as widespread.