LTE Link Monitor Issue with 9160

[Benjamin]

I was starting to develop for our own board based on the nRF9160 where we will just be using the LTE-M and while doing so, ran into issues with enabling the LTE. To do a sanity check, I went back to the 'at_client' example in the nRF Connect SDK 2.0.2 and programmed it on. I opened up the LTE Link Monitor v2.0.1 and this is what I'm seeing -- all the status indicators are red or gray:

I was able to get the Modem and UICC to turn green *once* by pulling out the SIM card and putting it back in, but then restarted the board and everything is red again. Here is my log file contents:

2022-08-01T21:44:31.667Z DEBUG Application data folder: /Users/user/Library/Application Support/nrfconnect/pc-nrfconnect-linkmonitor
2022-08-01T21:44:32.762Z INFO Using nrf-device-lib-js version: 0.4.11
2022-08-01T21:44:32.762Z INFO Using nrf-device-lib version: 0.11.8
2022-08-01T21:44:32.763Z INFO Using nrfjprog DLL version: 10.15.4
2022-08-01T21:44:32.763Z INFO Using JLink version: JLink_V7.64e
2022-08-01T21:44:32.895Z DEBUG App pc-nrfconnect-linkmonitor v2.0.1 official
2022-08-01T21:44:32.895Z DEBUG App path: /Users/user/.nrfconnect-apps/node_modules/pc-nrfconnect-linkmonitor
2022-08-01T21:44:32.895Z DEBUG nRFConnect 3.11.1, required by the app is (^3.8.0)
2022-08-01T21:44:32.895Z DEBUG nRFConnect path: /Applications/nRF Connect for Desktop.app/Contents/Resources/app.asar
2022-08-01T21:44:32.895Z DEBUG HomeDir: /Users/user
2022-08-01T21:44:32.895Z DEBUG TmpDir: /var/folders/0l/h7c0fmrn2s99zfj4sb1qlk_r0000gn/T/
2022-08-01T21:44:32.913Z INFO Installed JLink version does not match the provided version (V7.58b)
2022-08-01T21:44:35.732Z INFO Modem port is opened
2022-08-01T21:44:35.759Z DEBUG modem >> AT+CFUN?
2022-08-01T21:44:35.801Z DEBUG modem << +CFUN: 0
2022-08-01T21:44:35.804Z DEBUG modem << OK
2022-08-01T21:44:40.573Z DEBUG modem >> AT
2022-08-01T21:44:40.585Z DEBUG modem << OK
2022-08-01T21:44:51.655Z DEBUG modem << *** Booting Zephyr OS build v3.0.99-ncs1-1  ***
2022-08-01T21:44:51.676Z DEBUG modem << The AT host sample started
2022-08-01T21:45:13.078Z DEBUG modem >> AT+CFUN?
2022-08-01T21:45:13.088Z DEBUG modem << +CFUN: 0
2022-08-01T21:45:13.125Z DEBUG modem << OK
2022-08-01T21:45:14.661Z DEBUG modem >> AT+CFUN=1
2022-08-01T21:45:14.705Z DEBUG modem << OK
2022-08-01T21:45:48.294Z DEBUG modem >> AT+COPS=?
2022-08-01T21:48:48.295Z ERROR Network search failed: Error: 'AT+COPS=?
' timed out

What could possibly be going wrong here? I thought I was just configuring our new project incorrectly, but now using the 'at_client' example I get the same behavior. 

[Benjamin]

Ok, when I use those commands, it works! However, when I rebuild and reflash, it doesn't work again. I went through my kconfig for the nrf91 modem and it seems to be the same *except* I have the "nRF91 LTE Link control library" enabled on my own build. I have the LTE-M selected as my network mode, but it just keeps pulsing that it's searching, but if I run the commands you mentioned:

AT+CFUN=4
AT%XSYSTEMMODE=1,0,0,0
AT+CFUN=1

Then it works fine. What would I have wrong in the kconfig? That seems to be where my issue is, but I can't quite spot it.