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emnify IoT eSIM

emnify provides eSIMs that are built specifically for IoT solutions. The eSIMs come in different quality grades that are more durable than standard SIM. They can be updated over the air (OTA) using eSIM remote SIM provisioning technologies and come in different form factors.

emnify eSIMs have a multi-IMSI applet installed on the SIM. The multi-IMSI applet ensures that the best network and network partners are used based on your device location.


The emnify IoT eSIM is an M2M eSIM compliant with SGP.01, SGP.02, and SGP.016. The M2M eSIM is also called an embedded universal integrated circuit card (eUICC). Unlike a regular SIM (UICC), an eUICC can be updated OTA. You can update M2M eSIMs with new configurations or profiles, eliminating the need for SIM swaps.

Form factors

emnify IoT eSIMs are available in the following form factors.

Form factorDimensions
2FF (Mini SIM)15 x 25 x 0.75 mm
3FF (Micro SIM)12 x 15 x 0.75 mm
4FF (Nano SIM)8.8 x 12.3 x 0.75 mm
MFF2 (eSIM)5 x 6 x 0.75 mm, 8 pin

MFF2 eSIMs can be soldered onto a device and aren't readily removable.

Quality grades

emnify IoT eSIMs come in three different quality grades: Commercial eUICC, Industrial eUICC, and MFF2.

Commercial eUICCIndustrial eUICCMFF2
Hardware characteristicsForm FactorEmbedded/solderableMFF2
Removable CardTriple-cut or Dual-Cut2FF or 3FF
Chip TypeOperational and storage temperature-25°C to +85°C (JESD22-A104)-40°C to +105°C (JESD22-A104)
Operating voltage1.62V to 5.5V
InterfaceISO-7816, T=0
Chipset NVM size704 kilobytes
Chipset RAM size20 kilobytes
NVRAM characteristicsWrite Endurance500k erase per page 10M cycles with OS High Endurance
Data retention15 years @85°C
Moisture/Reflow conditionsMSL3 (J-STD020)
HumidityHA as per ETSI TS 102.671 / (JESD22-A101D)
CorrosionCX as per ETSI TS 102.671 (JESD22-A107)
VibrationVX as per ETSI TS 102.671 (JESD22-B103)
ShockSX as per ETSI TS 102.671 (JESD22-B104)
Common Criteria CertificateCCN-CC-5/2019

Compliance and software features

The following compliance standards and software features apply to all quality grades of emnify eSIMs.

emnify eUICC ComplianceGSMASGP.01 Embedded SIM Remote Provisioning Architecture1.1
SGP.02 Embedded UICC Technical Specification3.2
SGP.16 M2M Compliance Process1.1
TCAeUICC Profile Package Interoperable
Format Technical Specification
Software FeaturesEmbedded Universal Integrated Circuit Card (eUICC)Maximum number of profiles10
ISD-A and ISD-R system appletsSupported
EAP-SIM and EAP-AKA authentication protocolsSupported
LPWAN featuresSuspend and resume SIM state ETSI TS 102 221
Poll Interval Negotiation ETSI TS 102 221
OTA Capabilities on ISD-P:
Remote file management - RFM
Remote applet management - RAM
TLS 1.2Supported
AES algorithm (128-bit, 192-bit, and 256-bit keys)Supported
GlobalPlatformAll Secure Channel ProtocolsSupported
Java CardStandard Java Card APIsSupported
GlobalPlatform APISupported

Multi-IMSI applet

emnify IoT eSIM cards are equipped with a multi-IMSI applet. This technology is similar to a mobile phone using dual-SIM technology or eSIM profiles in consumer phones. The main difference is that the emnify eSIM already includes cellular provider identities (IMSI) from multiple SIM cards and any network switching is done automatically.

The multi-IMSI applet on the eSIM uses a preferred IMSI list per country. This list defines the available IMSIs for that country and the order in which to try when connecting. If your device moves to a new country with a different preferred IMSI, the applet dynamically overwrites the previously active IMSI with the preferred one for this country.

The automatic switching by the multi-IMSI applet solves several connectivity challenges. For example:

  • In Brazil, a local Brazilian IMSI must be used to be legally compliant with regulations.
  • While emnify has over 400 direct roaming agreements, utilizing roaming agreements from partner operators (IMSI sponsors) provides you with even more coverage and better pricing.
  • The applet detects any issues with the preferred IMSI and automatically switches to a fallback IMSI to regain connection.