Unable to Connect to Network Using ST4SIM200M eSIM with nRF9151 DK Board

[manoj_42]

Dear [Support Team / Sir/Madam],

I am encountering an issue with connecting to the network using an ST4SIM200M eSIM along with the nRF9151 DK board.

I have followed all necessary setup steps, but the device is still unable to successfully register on the network.

Here are the AT commands I executed along with their responses:

> AT

OK
> AT+CEREG=5

OK
> AT+CSCON=1

OK
> AT%XSYSTEMMODE=0,1,1,0

OK
> AT+CFUN=1

OK
> AT+CEREG?

+CEREG: 5,4

OK

+CEREG: 2,"C154","00366391",9

+CSCON: 1

+CEREG: 2,"C154","00366391",9,0,11

+CSCON: 0

+CEREG: 2
> AT#XPING="www.google.com",45,5000,5,1000
"EAI_SYSTEM"

ERROR

The AT+CEREG? command consistently returns 0,4, which indicates that the device is not registered and is searching for a network.
Additionally, AT+COPS? shows 0, implying automatic network selection, but registration is not succeeding.

For your information:

• I am located in Surat, Gujarat, India.

• The eSIM is the ST4SIM200M model provided for IoT deployments.

• The board in use is the nRF9151 DK.

And at the truphone website sim managment section i see my sim status is offline. explain me what is that and how to i activate to it. i share to my screeen shot of that page.

Could you please assist me in diagnosing and resolving this issue?
Any suggestions for further steps or required configurations would be greatly appreciated.

Thank you for your support.

Best regards,
Manoj Patil

[Andrew Neil]

---

@manoj_42 wrote:

the nRF9151 DK board.

---

That's a Nordic Semi product - nothing to do with ST.

You can ask Nordic for assistance here: https://devzone.nordicsemi.com/

Does your board work with any other SIM ?
Does your SIM work with any other board ?

 

---

@manoj_42 wrote:

> AT#XPING="www.google.com",45,5000,5,1000
"EAI_SYSTEM"

ERROR

---

There should be a way to get extended error information, with more details of the failure reason;

eg, AT+CMEE - Nordic would be able to help you with that...

[manoj_42]

Duplicate - Merged.

---

Hello ST Community,

I’m using the ST4SIM-200M eSIM module with nRF9151DK to connect to an Indian network operator from Surat, Gujarat, India, but I’m unable to successfully register to any network. The status stays as “searching” and eventually falls back to “deregistered”.

Setup:

• eSIM: ST4SIM-200M

• Modem: nRF9151DK (Nordic Semiconductor)

• Location: Surat, Gujarat, India

• Network attempts: Truphone (as per available APNs)

• Antenna: Properly connected

• Signal strength: Always returns +CSQ: 99,99

Commands Used:
> AT+CFUN=0
OK
> AT%XBANDLOCK=0
OK
> AT%XAPNSTATUS=1,"iot.truphone.com"
OK
> AT%XSYSTEMMODE=0,1,1,0
OK
> AT+CFUN=1
OK
> AT+COPS=?
+COPS: (1,"","","405857",9)
OK
> AT+CEREG?
+CEREG: 0,2
OK
> AT+COPS=?
+COPS: (1,"","","405857",9)
OK
> AT+CEREG?
+CEREG: 0,2
OK
> AT+CSQ
+CSQ: 99,99
OK
> AT%XAPNSTATUS?
%XAPNSTATUS:
OK
> AT+CFUN=0
OK
> AT+CGDCONT=1,"IP","iot.truphone.com"
OK
> AT%XAPNSTATUS=1,"iot.truphone.com"
OK
> AT+CFUN=1
OK
> AT%XAPNSTATUS?
%XAPNSTATUS:
OK (Repeated several times)
> AT+CEREG?
+CEREG: 0,2,"C154","005A3490",9
OK
> AT+CSQ
+CSQ: 99,99
OK

Problem Summary:

• +CEREG: 0,2 persists, indicating "searching" state.

• +CSQ: 99,99 shows unknown signal quality.

• %XAPNSTATUS does not seem to return expected APN status.

• Network shown as 405857 (unknown operator) via AT+COPS=?, but still no registration.

---

Questions:

1. Is the ST4SIM-200M eSIM pre-provisioned for Indian networks like Jio, Airtel, or Vi?

2. Are there specific configuration steps required to enable connectivity in India?

3. Does the signal level (99,99) suggest coverage issue, or is it a modem or SIM profile problem?

4. Is there any ST-provided tool or backend portal to view SIM provisioning or force profile selection?

Any guidance or troubleshooting suggestions would be highly appreciated.
Thanks & regards,
Manoj.

[manoj_42]

Hi,

Thanks for your inputs.

I just want to clarify that my main goal is to understand whether there are any specific configuration steps needed to get the ST4SIM-200M eSIM working with the nRF9151 DK board and to connect to the network.

As I mentioned earlier, the eSIM is already activated — I’ve shared a screenshot from the Truphone portal showing successful activation.

Here’s the latest AT command sequence I’ve tried with the nRF9151 board:

> AT+CFUN=0
OK
> AT%XBANDLOCK=0
OK
> AT%XAPNSTATUS=1,"iot.truphone.com"
OK
> AT%XSYSTEMMODE=0,1,1,0
OK
> AT+CFUN=1
OK
> AT+COPS=?
+COPS: (1,"","","405857",9)
OK
> AT+CEREG?
+CEREG: 0,2
OK
> AT+CSQ
+CSQ: 99,99
OK

Still, the signal remains +CSQ: 99,99 and registration state is +CEREG: 0,2.

Questions:

1. Is the ST4SIM-200M eSIM pre-provisioned for Indian networks like Jio, Airtel, or Vi?

2. Are there specific steps required to enable the eSIM profile or force selection on the ST4SIM?

3. Does the signal level 99,99 indicate a coverage issue, or could this point to a SIM profile or modem setup issue?

4. Is there any ST-provided tool or portal to check active SIM profiles or control profile switching for the ST4SIM-200M?
   

Any guidance on working with ST4SIM and Nordic hardware in this context would be much appreciated.

Thanks again!

[ilkintacan]

Dear manoj_42,
I'm experiencing the same issue. When I run:

 

AT+CSQ +CSQ: 99,99
I get no signal.
I've already registered my eSIM at truphone.com, but still no network connection — even after testing with two separate boards and two different (BC660 and EC-01F) modems.

How did you manage to solve this problem? Any suggestions would be appreciated.

Best regards,