Problem Running Demo Program on nRF91X Thingy

[rblackner]

Hi,

I recently started working with the nRF9151 DK and was able to run the initial demo programs without any issues. To continue testing, I picked up a Thingy:91 X, but it consistently fails to attach to the LTE network (yellow LED flashing).

What I’ve tried so far:

• Registered all SIM cards

• Connected using nRF Connect for Desktop → Quick Start → Start Prototyping

• Multiple power cycles and tests with different SIM cards

• Reprogrammed the device via Quick Start

Despite these steps, the device still gets stuck when searching for LTE.

Question:
What are the recommended next steps to debug LTE attach on the Thingy:91 X? Are there specific AT commands, APN settings, or modem trace procedures I should use to narrow down the issue?

Thanks in advance for any guidance!

[rblackner]

Started exploring the AT commands a little more. My understanding of the following is that 5,4 means we are still searching.