eUICC support - GSMA RSP M2M

[Rossen]

I would like to download a new SIM profile on a removable M2M eUICC which is inserted in Thingy91. Can you please let me know how this can be achieved on Thingy91?  

[Håkon Alseth]

Hi,

seludeft said:

How do we add / re-program the eUICC chip?

All communication is over the Sim Card interface.

Assuming consumer (not M2M eUICC), you access the SIM directly via the appropriate AT commands:

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/crsm.html?cp=2_1_3_8

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/csim.html?cp=2_1_3_9

 

I would recommend that you contact the eUICC provider to get details on how you should reprogram the specific eUICC using the standardized SIM communication channels that we provide.

 

Kind regards,

Håkon

[seludeft]

Håkon Alseth said:

All communication is over the Sim Card interface.

Great, then we don't have to "do anything more" :-)

Håkon Alseth said:

Assuming consumer (not M2M eUICC), you access the SIM directly via the appropriate AT commands:

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/crsm.html?cp=2_1_3_8

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/csim.html?cp=2_1_3_9

Thanks! We were looking at them, but were not sure ... now we are 

If we have multiple "UICC Profiles" installed in the eSIM (eUICC) ... do we use the AT+CRSM & AT+CSIM command to "switch" between "UICC Profiles"? ... or maybe with AT%XUSIMLCK ? Or another AT_CMD?

[Yeah Lets assume the slide says : From SIM Card to eSIM (Costomer) with Remote Provisioning ]

Håkon Alseth said:

I would recommend that you contact the eUICC provider to get details on how you should reprogram the specific eUICC using the standardized SIM communication channels that we provide.

Of course! as one should always do  ... but right now, we would like to understand how it all connects, how "They" have thought up the solution to work (and it's becoming clearer and clearer )

BTW, for anyone else reading this tread .... go and read this whitepaper: GSMA - eSim Whitepaper - The what and how to Remote SIM Provisioning

[seludeft]

Rossen BTW have you read this whitepaper: GSMA - eSim Whitepaper - The what and how to Remote SIM Provisioning ?

 

[Håkon Alseth]

Hi,

 

seludeft said:

If we have multiple "UICC Profiles" installed in the eSIM (eUICC) ... do we use the AT+CRSM & AT+CSIM command to "switch" between "UICC Profiles"? ... or maybe with AT%XUSIMLCK ? Or another AT_CMD?

The first two is highly likely the one's you'll use. If you have multiple profiles, it isn't unusual that a SIM can store more than one profile.

XUSIMLCK locks towards a specific SIM card:

The set command allows locking the modem to work with predefined USIM cards. 
Using the command, the modem can be personalized, depersonalized, or the lock of a category can be disabled if the category is not depersonalized.

It is also possible to configure USIM personalization so that the device is locked to the first USIM that is inserted to it.

This command isn't aimed towards initial configuration of a SIM on the level that you are looking for. If you want to lock a device to a specific SIM, you can use this AT command do to that.

 

seludeft said:

BTW, for anyone else reading this tread .... go and read this whitepaper: GSMA - eSim Whitepaper - The what and how to Remote SIM Provisioning

 Thank you for sharing! This one is very informative, I'll be sure to read this :)

Kind regards,

Håkon

[Holger Lamm]

Today I tried this with my eSIM provider.
He started the process, but got no reply from my device.

the operator said he could send me the commands via SMS and it seems to be processed in principle (an "assess device" SMS was immediately replied to), but for the M2M provisioning SMS the device failed to open the BIP channel.

There are 2 unusual messages I got during the process in the LTE Link monitor:

- +CNEC_ESM: 33,1   described as "Requested service option not subscribed" by the Link monitor;

- +CGEV: RESTR 2,2   described as "Unknown action: RESTR" by the Link monitor, but described as "Requested procedure restricted (Throttling, Temporary)" in the AT command documentation.

Is there something I have done wrong, or have to activate?