Blockchain and eSIM are disruptive technologies in the mobile industry facing resistance from established players. Despite this, they are slowly being adopted due to innovation and companies that see the value in change. Both technologies have a secure future and it's only a matter of time before eSIMs become the norm, with blockchain helping to drive their adoption.

NOTICE: Building a blockchain powered eSIM will require discussions followed by adjustments with carrier providers and device manufacturers.

• Resources and takeaways
• Existing Products and takeaways
• Work at EthIndia Fellowship 3.0

eSIM

An eSIM(embedded-SIM) is a form of programmable SIM card that is embedded directly into a device.

Instead of an integrated circuit located on a removable universal integrated circuit card (UICC), typically made of PVC, an eSIM consists of software installed onto an eUICC chip permanently attached to a device.

Once an eSIM carrier profile has been installed on an eUICC, it operates the same as a physical SIM, complete with a unique ICCID and network authentication key generated by the carrier.

The eSIM standard was first released in 2016; since that point, eSIM has begun to replace physical SIM in domains including cellular telephony.

Since 2010, the GSMA had been discussing the possibility of a software-based SIM.

To avoid any confusion, suggesting the following way of looking at the definition:

"eSIM is the whole service - SIM + eUICC + platform eUICC is the software that allows provisioning."

And also the difference

• An eSIM, or embedded SIM, is a programmable SIM card that is built into a device and can be remotely activated and provisioned.
• It's not a software in the traditional sense, but it can be thought of as an integrated circuit that contains firmware and data storage.
• The structure of an eSIM is similar to a traditional SIM card, but it's an electronic chip embedded in the device's hardware.
• eSIMs have a unique identifier, which is similar to a traditional SIM card's ICCID, and can store multiple network profiles that can be activated based on the user's preference.
• eSIMs work by using remote provisioning to download and install network profiles over the air (OTA).
• The remote provisioning process involves several steps, including registration, download, activation, and management.
• eSIMs provide enhanced security features, such as encryption and authentication, to protect user credentials and prevent fraud.
• eSIM technology provides a flexible and secure way to activate and manage network services on a device without the need for physical SIM cards.