Sim Card not Detected on Thingy:91

[rishj09]

Hi, 

I am in the process in getting the AWS version of the Asset Tracker v2 on my Thingy:91. I was having some issues with getting the cerificate but was able to get that resolved as seen in this ticket (https://devzone.nordicsemi.com/f/nordic-q-a/84015/provisioning-device-certificate-for-aws-on-thingy91). 

Now, I am having issues with my Thingy91 recognizing my Sim card. Prior to this, I was able to use the device with the vanilla Asset Tracker v2 with nRF cloud and there were no issues. I have tried using another sim card (which I tested was working on my DK) and I get the same error. When I am running the Asset Tracker v2 code, it keeps on rebooting as seen in the error log below as it seems to think that a sim card is not detected. 

�*** Booting Zephyr OS build v2.7.0-ncs1  ***ng!
[00:00:00.223,876] <wrn> at_notif: Already initialized. Nothing to do
[00:00:00.240,356] <inf> event_manager: APP_EVT_START
[00:00:00.247,009] <inf> event_manager: DATA_EVT_CONFIG_INIT
[00:00:00.253,570] <inf> event_manager: APP_EVT_ACTIVITY_DETECTION_DISABLE
[00:00:00.261,383] <inf> event_manager: MODEM_EVT_INITIALIZED
[00:00:00.332,702] <inf> event_manager: MODEM_EVT_LTE_CONNECTING
[00:00:00.577,941] <err> modem_module: No SIM card detected!
[00:00:00.584,442] <inf> event_manager: MODEM_EVT_ERROR - Error code -134
[00:00:00.592,193] <inf> event_manager: MODEM_EVT_LTE_CELL_UPDATE
[00:00:00.599,151] <inf> event_manager: UTIL_EVT_SHUTDOWN_REQUEST
[00:00:00.606,201] <inf> event_manager: UI_EVT_SHUTDOWN_READY
[00:00:00.612,396] <wrn> modules_common: Module "ui" shutdown registered
[00:00:00.619,842] <inf> event_manager: GPS_EVT_SHUTDOWN_READY
[00:00:00.626,190] <wrn> modules_common: Module "gps" shutdown registered
[00:00:00.634,094] <inf> event_manager: APP_EVT_SHUTDOWN_READY
[00:00:00.640,380] <wrn> modules_common: Module "app" shutdown registered
[00:00:00.648,559] <inf> event_manager: DATA_EVT_SHUTDOWN_READY
[00:00:00.654,968] <wrn> modules_common: Module "data" shutdown registered
[00:00:00.663,085] <inf> event_manager: MODEM_EVT_LTE_DISCONNECTED
[00:00:00.670,379] <inf> event_manager: CLOUD_EVT_SHUTDOWN_READY
[00:00:00.676,910] <wrn> modules_common: Module "cloud" shutdown registered
[00:00:00.684,753] <inf> event_manager: SENSOR_EVT_SHUTDOWN_READY
[00:00:00.691,314] <wrn> modules_common: Module "sensor" shutdown registered
[00:00:00.756,347] <inf> event_manager: MODEM_EVT_SHUTDOWN_READY
[00:00:00.762,969] <wrn> modules_common: Module "modem" shutdown registered
[00:00:00.770,507] <wrn> util_module: All modules have ACKed the reboot request.
[00:00:00.778,533] <wrn> util_module: Reboot in 5 seconds.

I have also tried to get some additional information through LTE Link Monitor. The error code I get for AT%XSIM? seems to indicate it is an USIM failure. However, this exact sim card is working on my DK. Could this be an issue introduced by something I did when installing the certificates? I have also tried reflashing the modem firmware but the issue still persists. 

2022-02-05T21:57:22.036Z DEBUG modem >> AT+CFUN=1
2022-02-05T21:57:22.056Z DEBUG modem << OK
2022-02-05T21:57:22.297Z DEBUG modem << +CEREG: 90
2022-02-05T21:57:23.533Z DEBUG modem >> AT+CFUN?
2022-02-05T21:57:23.542Z DEBUG modem << +CFUN: 1
2022-02-05T21:57:23.551Z DEBUG modem << OK
2022-02-05T21:57:23.566Z DEBUG modem >> AT+CGSN=1
2022-02-05T21:57:23.581Z DEBUG modem << +CGSN: "352656106116299"
2022-02-05T21:57:23.583Z DEBUG modem << OK
2022-02-05T21:57:23.589Z DEBUG modem >> AT+CGMI
2022-02-05T21:57:23.603Z DEBUG modem << Nordic Semiconductor ASA
2022-02-05T21:57:23.605Z DEBUG modem << OK
2022-02-05T21:57:23.607Z DEBUG modem >> AT+CGMM
2022-02-05T21:57:23.619Z DEBUG modem << nRF9160-SICA
2022-02-05T21:57:23.621Z DEBUG modem << OK
2022-02-05T21:57:23.623Z DEBUG modem >> AT+CGMR
2022-02-05T21:57:23.635Z DEBUG modem << mfw_nrf9160_1.3.1
2022-02-05T21:57:23.637Z DEBUG modem << OK
2022-02-05T21:57:23.637Z INFO Nordic Semiconductor ASA nRF9160-SICA [mfw_nrf9160_1.3.1] SerNr: 352656106116299
2022-02-05T21:57:23.639Z DEBUG modem >> AT+CEMODE?
2022-02-05T21:57:23.653Z DEBUG modem << +CEMODE: 2
2022-02-05T21:57:23.658Z DEBUG modem << OK
2022-02-05T21:57:23.669Z DEBUG modem >> AT%XCBAND=?
2022-02-05T21:57:23.683Z DEBUG modem << %XCBAND: (1,2,3,4,5,8,12,13,18,19,20,25,26,28,66)
2022-02-05T21:57:23.688Z DEBUG modem << OK
2022-02-05T21:57:23.696Z DEBUG modem >> AT+CMEE?
2022-02-05T21:57:23.707Z DEBUG modem << +CMEE: 1
2022-02-05T21:57:23.709Z DEBUG modem << OK
2022-02-05T21:57:23.722Z DEBUG modem >> AT+CNEC?
2022-02-05T21:57:23.734Z DEBUG modem << +CNEC: 24
2022-02-05T21:57:23.736Z DEBUG modem << OK
2022-02-05T21:57:23.741Z DEBUG modem >> AT+CGEREP?
2022-02-05T21:57:23.752Z DEBUG modem << +CGEREP: 1,0
2022-02-05T21:57:23.754Z DEBUG modem << OK
2022-02-05T21:57:23.759Z DEBUG modem >> AT+CIND=1,1,1
2022-02-05T21:57:23.768Z DEBUG modem << OK
2022-02-05T21:57:23.770Z DEBUG modem >> AT+CEREG=5
2022-02-05T21:57:23.776Z DEBUG modem << OK
2022-02-05T21:57:23.778Z DEBUG modem >> AT+CEREG?
2022-02-05T21:57:23.786Z DEBUG modem << +CEREG: 5,90
2022-02-05T21:57:23.788Z DEBUG modem << OK
2022-02-05T21:57:23.804Z DEBUG modem >> AT%CESQ=1
2022-02-05T21:57:23.810Z DEBUG modem << OK
2022-02-05T21:57:23.818Z DEBUG modem >> AT+CESQ
2022-02-05T21:57:23.826Z DEBUG modem << +CESQ: 99,99,255,255,255,255
2022-02-05T21:57:23.828Z DEBUG modem << OK
2022-02-05T21:57:23.839Z DEBUG modem >> AT%XSIM=1
2022-02-05T21:57:23.844Z DEBUG modem << OK
2022-02-05T21:57:23.852Z DEBUG modem >> AT%XSIM?
2022-02-05T21:57:23.859Z DEBUG modem << %XSIM: 0,9
2022-02-05T21:57:23.860Z DEBUG modem << OK

Thanks!  

[Charlie]

Hi Rishj09,

I found two similar reports:

Error "Non Registered due to UICC Failure" - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

nRF9160 and eSIM module first time initialization - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

Are you using the SIM card from iBsis or SIM card from a local operater?

You can consider debugging from the following directions:

1. Try to test with different SIM cards. If you are using iBsis SIM card, there is less chance SIM card has an issue, then try the next step.

2. Check the SIM card holder soldering condition, try to test with another Thingy91 if possible.

Best regards,

Charlie

[rishj09]

I have tried using both the iBasis and a local (AT&T) sim card. Both of these sim cards work with my DK but not with the Thingy. 

I do not have another Thingy but have tested the sim cards on my nRF9160DK on which they work properly. 

Is it possible that something in the certificate flash process described here (https://nordicsemiconductor.github.io/asset-tracker-cloud-docs/v1.8.x/docs/aws/GettingStarted/DeviceCredentials.html)  caused something which is causing this issue?

I have checked the connections and cleaned with compressed air and the issue still persists. The device is pretty new so if there is a HW problem, is a replacement covered? 

Also, are there any test measurements I could make using the test points to make sure the SIM card is getting the proper voltage and such?