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What is eSIM?

Apple and Google devices have applied eSIM technology recently. However, what it is? Why do people keep talking about eSIM? Is it important for us?

According to Google Trends, the search rate of “eSIM” is becoming a popular keyword, a much higher listing than “Prepaid SIM” during September.

eSIM - Google listing


The eSIM/Embedded SIM, or as it’s more formally known, embedded Universal Integrated Circuit Card (eUICC), is smaller again at 6 mm in length and 5 mm in width and is soldered onto a device’s motherboard at the point of manufacturing while having the same functionality as a removable SIM.

eSIM - Sim card summary

The difference between a traditional SIM and eSIM is that eSIM operates a virtual SIM card. That means you can install it on your phone without the casing of a traditional SIM card. The eSIM is already installed on your device and you will never see it, even when you change your mobile network provider or plan.

Simply put, an eSIM is a feature concept for the way a SIM profile is managed. A traditional SIM is provisioned with a single profile which usually has 64KB or 128KB of memory. An eUICC can host multiple profiles and requires a minimum memory of 512KB.


Process for purchase of an eSIM

Currently, a customer needs to wait for the physical SIM card from an hour to few days which is depending on the purchase method. However, purchasing eSIM is easier and faster. All processes can be managed in a self-service method.

eSIM - Process for purchases of eSIM

The Benefits

  • It is an easy and immediate connection of the devices to mobile networks.
  • Extends mobile connectivity to much smaller device form factors, including smartwatches, health bands etc.
  • Avoids fragmentation in the market
  • Enhances the overall customer experience when purchasing a plan or switching network – can be done virtually


eSIM application

Apple – Apple SIM

Google – Project Fi

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