Registration rejected after SDK update

[Bernhard]

Hello,

I am trying to update a project from SDK v2.6.1 to v3.1.0, but with the updated SDK my device is not able to connect to the network anymore:

<wrn> lte_lc: Registration rejected, EMM cause: 15, Cell ID: 1395462, Tracking area: 49, LTE mode: 7

I also made a temporary version with SDK v2.7.0 (to test only required changes for sysbuild and HWMv2), which was also working fine.

Flashing back the original merged.hex is working fine, so I guess it has nothing to do with the network itself.

In was not able to find anything related in the changelogs, migration guides or the samples.

I am using modem firmware v1.3.7

Any hints would be helpful
Thank you.

Best regards,
Bernhard

[Benjamin]

Thanks,

Just to confirm, the GNSS sample works on your board in pre v2.7.0 versions?

[Bernhard]

Hello Benjamin,

I have to apologize, I think it's actually kind of working.

It seem's like I just had bad reception which did not print error messages in older SDK versions, but the lte modules were changed a lot so the behaviour is now different, I think also the retry timeout is shorter now.

Under better conditions / on a different location it's actually working.

Thank you anyhow!

Best regards,
Bernhard

[Benjamin]

That is great to hear!