After the activation process, the user has access to all the functionalities to manage the SIM cards and
connectivity as well as the activation of any additional SIM cards to the same user account.
Figure 22.
Dashboard screenshot
Click on “Activate SIMs” and a new page appears to invite the user to enter the ICCID of the eSIM to be activated.
Step 3: Perform Network search and registration
To force the device to search and register to a cellular network known as PLMN selection, the user simply needs
to reboot the board either by pressing the black reset button or disconnect and reconnect the USB ST-LINK cable.
The first time the boards registers to the network it may take some time, normally a few seconds but it can take
up to 20 minutes to find a network, depending on the radio environment, used technology (Cat M or NB-IoT), and
Truphone
®
network availability.
9.3
Embedded secure element
An eSE (embedded secure element) applet can also be hosted in the ST4SIM-200M. It can be used to store
application credentials (Certificates and keys). The access to eSE is controlled and exposed via a software library
provided by STMicroelectronics as part of the application software developed for the board.
The eSE can be accessed at any time irrespective of the SIM slot that is used for the connectivity. Indeed, a
plastic SIM card can be used for connectivity while eSE can still be used to access application credentials and
related security services. The only constraint is that when eSE is used or accessed (either via ISO or SPI), the
modem hardware cannot enter in its deepest low power as the modem firmware controls the power supply of the
ST4SIM-200M module.
Note:
eSE applet is by default not present in ST4SIM-200M. To enable such a feature, the user must contact
STMicroelectronics.
UM2743
Embedded secure element
UM2743
-
Rev 1
page 38/58
