https://devzone.nordicsemi.com/f/nordic-q-a/125225/monogoto-sim-card-diont-detectedhave a MONOGOTO SIM card that works successfully with TELIT and THALES modems. However, the same SIM card is not detected on the NRF9151-DK. When I send AT+CPIN? , I get: +CME ERROR: 13 On the other hand, a regular (ORANGE\CELLCOM\PELEPHONEen-USTelligent Community 13Wed, 12 Nov 2025 08:20:33 GMThttps://devzone.nordicsemi.com/thread/554068?ContentTypeID=1Wed, 12 Nov 2025 08:20:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dd3020ef-3e30-41a9-8baa-e6218b66db17Oleg-AgamControl<p>The problem was that the SIM card needs much more time &mdash; up to 2&ndash;3 minutes &mdash; to activate during the first power-up. My program, however, would stop, cut off the SIM power, and restart the controller whenever a SIM error occurred. After I changed the code to keep the SIM powered on for a few minutes after startup, the SIM registered successfully, and now everything works normally</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/552602?ContentTypeID=1Tue, 28 Oct 2025 09:02:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b562191d-6698-499e-ba7c-0e66d5cb4dd7Susheel Nuguru<p>Hi,&nbsp;</p> <p>Which SDK and Modem firmware are you running on the nRF91-DK?</p> <p>Can you please have the latest NCS and modem firmware flashed and run&nbsp;<br /><pre class="ui-code" data-mode="text">AT+CGMR</pre></p> <p>Does the MONOGOTO sim require 1.8V or 3.0V, Nordic&#39;s modem negotiates voltage based on SIM ATR but if the SIM is not responding correctly, it might default to 3V.</p> <p>Similar discussion can be found <a href="https://devzone.nordicsemi.com/f/nordic-q-a/116406/nrf9151-dk-vdd-3v">here</a></p><div style="clear:both;"></div>