Thingy 91X will not connect to nrf.cloud out-of-the-box

RE: Thingy 91X will not connect to nrf.cloud out-of-the-box

Øyvind — Mon, 18 Aug 2025 06:58:44 GMT

As far as I can tell there is nothing wrong with your device, but we will need more logs in order to pinpoint what exactly is failing.

Could you please provide modem traces from your device with the failing SIM cards?

Kind regards,
Øyvind

RE: Thingy 91X will not connect to nrf.cloud out-of-the-box

dschipf — Fri, 15 Aug 2025 16:05:19 GMT

Hi Øyvind,

I tested this device with both of the SIM cards that the 91X comes with. I've also tested it with two other SIM cards. It doesn't seem to work. I guess I will organize a refund with Mouser.

Regards,

David

RE: Thingy 91X will not connect to nrf.cloud out-of-the-box

Øyvind — Fri, 15 Aug 2025 07:18:07 GMT

Thanks for sharing. Is this all the logs that you get out from the device?

The device is rejected by the network with EMM Cause #17 – Network failure

This EMM cause is sent to the UE if the MME cannot service an UE generated request because of PLMN failures.

Looking at Onomondo's coverage map the device should be able to connect to AT&T and T-Mobile

Are you able to test with another SIM? This does not seem like an issue with the Thingy:91X directly.

Kind regards,
Øyvind

RE: Thingy 91X will not connect to nrf.cloud out-of-the-box

dschipf — Thu, 14 Aug 2025 15:52:14 GMT

Thank you for your help.

I did not try it before using the quick start. I programmed the Thingy 91X with the hello.nrf.cloud program (through the quick start wizard). I'm using nrfConnect 5.2.0.

The Thingy 91X has a slow yellow blink when turned on, which according to the documentation means that it is trying to reconnect to the cellular network. Please see the image below for the message I get in the terminal. I am using a linux OS, and the Onomondo SIM card that came with the Thingy 91x, which I registered. I previously owned a Thingy 91X that worked after going through the quick start program and inserting the Onomondo SIM card, so I am a bit concerned that this device is not working. I am in Spokane, WA USA.

RE: Thingy 91X will not connect to nrf.cloud out-of-the-box

Øyvind — Thu, 14 Aug 2025 10:20:55 GMT

Hello, did you test the Thingy:91X out of the box, before programming it with the Quick Start app? The Thingy:91X comes pre-programmed with the Hello nRF Cloud application.

Could you please provide some screenshot of the issue? In nRF Connect for Desktop, open the Serial Terminal and connect to your Thingy:91X. What output do you get from the device? Please copy and paste full application log here.

Kind regards,
Øyvind