nRF9160 not registering with cellular network in India

[ramakrishnabodepudi]

Hi,

I am facing a problem with connecting nRF9160-DK to the cellular network. waited for more than hour for connection but always showing "Not registered, attaching or searching" in cellular Monitor Application.

Details: - 

Application: - asset tracker example from nRF connect Application (flashed using nRF connect) 

SIM: - AT&T SIM’s with internation plan.

Error message: - +CEREG: 2,"C07E","0016AD91",9,0,19

Attached a trace log from Device.

trace-2024-07-10T13-55-33.269Z.mtrace

[Øyvind]

Hello, 

Your device is rejected with cause 19 

Cause #19 – ESM failure This EMM cause is sent to the UE when there is a failure in the ESM message contained in the EMM message.

This is referring to this cause

Cause #31 – Request rejected, unspecified This ESM cause is used by the network or by the UE to indicate that the requested service or operation or the request for a resource was rejected due to unspecified reasons.

What kind of SIM is this? Does it support NB-IoT? In what location are you testing? I.e. does the local network provide any answers?

Kind regards,
Øyvind

[ramakrishnabodepudi]

we don't have any issue connecting a BG96 with AT&T sim in same location (Hyderabad, India).

[Øyvind]

Does the Quectel BG96 connect via EGPRS? The nRF91-series are LTE-m and NB-IoT only. Please verify that SIM supports these two.

[ramakrishnabodepudi]

My colleagues in USA able to connect NB-IoT with nRF9160-DK and AT&T SIM but same setup is not working in India.

screenshot attached.

[Øyvind]

According to the GSMA Mobile IoT Deployment Map, Jio is the only provider supporting NB-IoT.

[ramakrishnabodepudi]

I have tested with JIO SIM but nrf9160 is not registering for NB-IoT. I am using a mobile JIO SIM as part of my testing. Do i need to use any Special IOT SIM's for testing? logs are attached.trace-2024-07-18T12-07-02.057Z.mtracetrace-2024-07-18T13-58-12.493Z.mtracetrace-2024-07-18T14-03-11.124Z.mtrace

[ramakrishnabodepudi]

Can you share AT command sequence for nrf9160? is there any AT command to enable roaming on nrf9160?