STUCK LTE Connection

RE: STUCK LTE Connection

Hakon — Wed, 15 May 2024 11:49:45 GMT

Modem mentioned;

The only LTE-M network found was 222 10 and the network rejected Attach with ESM cause #29 “User authentication failed”. Later modem was reactivated and then at first Attach Accept was not received from network but the second Attach attempt resulted again with reject and cause #29.

From NB-IoT modem attempted Attach to network 222 10, which rejected Attach with EMM cause #17 “Network failure”. After that, there is a gap in traces, but it based on other traces I can see that modem is deactivated. Therefore, the other found NB-IoT networks are not attempted (222 88 & 222 01).

In summary, it seems like the SIM card subscription is not valid for network 222 10 or there are some kind of problem in the network. The other found networks (in NB-IoT) were not tried to Attach because the modem was deactivated just before the attempts. Customer can try to select the networks one by one with %COPS to see whether the subscription allows the Attach. The reject causes can be seen by subscribing +CNEC (both EMM and ESM error codes).

RE: STUCK LTE Connection

nardoz-dev — Wed, 08 May 2024 13:24:34 GMT

Yes of course, this the .mtrace !

devzone.nordicsemi.com/.../trace_2D00_2024_2D00_05_2D00_08T13_2D00_19_2D00_08.002Z.mtrace

RE: STUCK LTE Connection

Hakon — Fri, 03 May 2024 11:46:59 GMT

While you are still waiting for the answer you can try to provide a raw trace file, in the .bin or .mtrace format.

RE: STUCK LTE Connection

nardoz-dev — Thu, 02 May 2024 07:55:25 GMT

Yes I am waiting for an answer

RE: STUCK LTE Connection

Hakon — Mon, 29 Apr 2024 16:03:43 GMT

Not yet. Have you contacted Pelion support team? What did they say?

RE: STUCK LTE Connection

nardoz-dev — Mon, 29 Apr 2024 09:15:17 GMT

Thanks, any news about the modem trace ?

RE: STUCK LTE Connection

Hakon — Fri, 26 Apr 2024 16:09:09 GMT

[quote user="nardoz-dev"]Where can i find the documentation about the meanings of esm error ? [/quote]

I believe you can find it in the 3GPP specification.

RE: STUCK LTE Connection

nardoz-dev — Fri, 26 Apr 2024 10:28:47 GMT

Hello, thanks for the reply..

Okay I will contact them,
Meanwhile this is what I captured through the cellular monitor program.

devzone.nordicsemi.com/.../analysis_2D00_pelion_5F00_v1.pcapng

Where can i find the documentation about the meanings of esm error ?

Kind regards
Andrea

RE: STUCK LTE Connection

Hakon — Thu, 25 Apr 2024 09:23:42 GMT

Hello,

the network is giving the error code ESM 29 (user authentication failed). This could be caused by a number of reasons so the best option is to contact Pelion support and ask why your device is being rejected. And if you still aren't able to identify the cause, you can capture a modem trace and upload it in this ticket.