A device incorporates an eSIM (embedded SIM), a sort of programmable SIM card. In place of an integrated circuit that is stored on a detachable universal integrated circuit card (UICC), which is often made of PVC, an eSIM consists of software put onto an eUICC chip that is permanently attached to a device.
When an eUICC is configured with an eSIM carrier profile, it performs just like a physical SIM, complete with a unique ICCID and network authentication key generated by the carrier.
The eSIM standard has begun to replace physical SIM in a number of industries, including cellular telephony since it was first introduced in 2016.
Is eSIM better?
Yes, eSIM is better than a physical SIM card since it offers so many advantages. For example, because eSIM is so small, it frees up space inside of devices to accommodate other parts or, possibly, a longer battery life.
Additionally, eSIM is safe and can be copied.