Requirements for eSIM

An embedded-SIM (eSIM) or embedded universal integrated circuit card (eUICC) is a form of programmable SIM card that is embedded directly into a device. The surface mount format provides the same electrical interface as the full size, 2FF, and 3FF SIM cards, but is soldered to a circuit board as part of the manufacturing process. In machine to machine (M2M) applications where there is no requirement to change the SIM card, this avoids the requirement for a connector, improving reliability and security. An eSIM can be provisioned remotely; end-users can add or remove operators without the need to physically swap a SIM from the device.

In order to use eSIM with Teltonika FM devices, some basic requirements must be met.

1. eSIM dimensions

Must match standard MFF2 eSIM size:

2. eSIM pin-out

There are two default eSIM pin-outs:

The only difference in pin-outs is the IO pin – 2 or 3. Both versions of pin-outs are suitable for devices with eSIM.

3. Requirements for eSIM packing reel:

13“ in diameter.

4. Compatibility with Teltonika FM devices

Project	Current SIM configuration	Possibility to solder eSIM?	Possibility to have eSIM + another SIM?
FMB110/FMB120/FMB130/FMB140	Micro SIM	Yes	Yes. Micro SIM + eSIM
FMB122/FMB125	Dual Standard SIM	Yes	Yes. Standard SIM + eSIM
FMU125/FMC125/FMM125	Dual Standard SIM	Yes	No
FMU126	Dual Micro SIM	Yes	No
FMU130/FMC130/FMM130	Micro SIM	Yes	No
FMB202/FMB204/FMB206	Micro SIM	Yes	Yes. Micro SIM + eSIM
FMB208	Micro SIM	Yes	Yes. Micro SIM + eSIM
FMB900/FMB920	Micro SIM	Yes	Yes. Micro SIM + eSIM
FMC640/FMM640	Dual Standard SIM	Yes	Yes. 2 x eSIM Possible
FMB640	Dual Standard SIM	Yes	Yes. Standard SIM + eSIM
FMB001/FMB010	Micro SIM	Yes	Yes. Micro SIM + eSIM
FMB002/FMB020/FMB003	Nano SIM	No	-
FMM001/FMC001	Micro SIM	Yes	No
FMT100	Micro SIM	Yes. Special Hardware	No. Only 1 SIM type can be used (ether eSIM or Micro SIM)
FMP100	Nano SIM	Yes	Yes. Nano SIM + eSIM