Comparison between eSIM and Multi-IMSI

Although both eSIM and multi-IMSI are used in cellular connectivity, they solve different problems and work in different ways.

Synopsis: Digi eSIM provides you with the ability to use native profiles, is not locked to a particular carrier, and can load multi-IMSI profiles from MVNOs!

eSIM technology

Multi-IMSI technology

What are they?

eSIM is a technology that allows a device to store multiple digital carrier profiles on a programmable chip.

These profiles can be:

  • Downloaded remotely

  • Switched through software

  • Replaced without handling a physical SIM card

Key idea: A device can load and manage different carrier profiles on the same chip.

Multi-IMSI is a technology where a single SIM card (physical or eSIM) contains multiple IMSIs—multiple subscriber identities—programmed into it. The SIM can switch between these identities based on rules such as:

  • Network availability

  • Roaming conditions

  • Carrier agreements

  • Cost or coverage

Key idea: A single SIM can act like it belongs to multiple carriers or plans.

How do they differ?

eSIM = digital SIM with downloadable carrier profiles

  • Profiles can be added, removed, and updated remotely.

  • Works through a remote provisioning system.

  • The device can store several profiles and choose one at a time.

  • Focus is on flexibility and eliminating physical SIM swaps.

Multi-IMSI = single SIM with many identities already built in

  • IMSIs are preloaded by the SIM provider.

  • The SIM switches identities automatically based on rules.

  • No need to download or install separate profiles.

  • Focus is on global coverage and automatically avoiding roaming issues.

What is a simple description of each one?

eSIM is like having a device that can download different SIM cards as needed.

 Multi-IMSI is like having several SIM cards built into one, and the card switches between them automatically.

Why use eSIM and not multi-IMSI?

eSIM provides native profiles, is not locked to a particular carrier, and can load multi-IMSI profiles from MVNOs!