https://devzone.nordicsemi.com/f/nordic-q-a/89645/can-t-get-icciduse ncs v1.9.1 Can&#39;t get ICCID. Appenddix is the source code.en-USTelligent Community 13Tue, 05 Jul 2022 10:18:17 GMThttps://devzone.nordicsemi.com/thread/375515?ContentTypeID=1Tue, 05 Jul 2022 10:18:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50bd76ae-050e-4238-bc03-19116c9043aeDidrik Rokhaug[quote user="john.liu"]Is it need to change to serial_lte_modem example when using &quot;AT+CFUN=41&quot;?[/quote] <p>No, you can send AT commands from the application using the AT interface in the modem library: <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/nrfxlib/nrf_modem/doc/at_interface.html">https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/nrfxlib/nrf_modem/doc/at_interface.html</a> </p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/375508?ContentTypeID=1Tue, 05 Jul 2022 09:49:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67ae0251-3418-4a04-8dae-485a3f249eefjohn.liu<p>Hi&nbsp;<span>Didrik</span><span>:</span></p> <p><span>Thank for you help.</span></p> <p><span>Is it need to change to serial_lte_modem example when using &quot;AT+CFUN=41&quot;?</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/375475?ContentTypeID=1Tue, 05 Jul 2022 08:24:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:abb241a0-fb71-4d79-9531-06fb72b610aeDidrik Rokhaug<p>Hi,</p> <p>Looks like you are trying to read the ICCID from the SIM card before the SIM card is powered.</p> <p>The SIM card is not powered by the modem until it is needed, i.e. you start an LTE network search.</p> <p>You can also turn on the SIM card without starting the LTE stack by sending AT+CFUN=41.</p> <p>Best regards,</p> <p>Didrik</p><div style="clear:both;"></div>