https://devzone.nordicsemi.com/f/nordic-q-a/80666/turning-the-modem-on-in-a-applicationHi, I received the nRF9160DK yesterday, and used the AT Client to get talking to the modem and connecting to a network. In VS Code I built an application from sample - Simple MQTT. When I debug the application, it always fails to talk to the modemen-USTelligent Community 13Thu, 14 Oct 2021 13:16:51 GMThttps://devzone.nordicsemi.com/thread/334180?ContentTypeID=1Thu, 14 Oct 2021 13:16:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1657a2bb-15c2-480e-8ac2-46395b8a3520DamoL<p>Nevermind, I have found it. In the proj.conf file&nbsp; you need;</p> <p><pre class="ui-code" data-mode="text">CONFIG_NRF_MODEM_LIB_SYS_INIT=y</pre></p><div style="clear:both;"></div>