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Language Foundation

eSIM

An eSIM is an embedded Subscriber Identity Module, a SIM built into a phone or other mobile device instead of being a removable card.

In plain English

It is the SIM as a built-in part of the device, not a separate piece that is inserted or taken out. The term refers to a phone's or other mobile device's internal SIM rather than a removable card.

In context

Here, it names the activation choice for using the device's built-in SIM instead of a removable card.

Situation
Porting numbers, activating SIM or eSIM, replacing devices, and changing account details
What it communicates
names the digital-SIM option in activation choices

Meaning limits

By itself, the term only identifies the built-in form of a SIM and does not state availability, eligibility, or any result.

Examples

“This phone has an eSIM, while the older one takes a removable SIM card.”

Core meaning

“For mobile service on this tablet, choose eSIM rather than insert a SIM card.”

In context

  • SIM Broader Term

    An eSIM is one kind of SIM.

  • removable SIM card Contrast

    This differs by being a separate card rather than built into the device.