https://devzone.nordicsemi.com/f/nordic-q-a/127411/nrf9151-udp-data-transmissionHi everyone, I am currently working with the nRF9151DK using nRF Connect SDK v3.2.3 (Zephyr OS v4.2.99). I am trying to run a basic UDP sample with a Terrestar Solutions SIM card, but I am unable to get a network attachment or an IP address and thenen-USTelligent Community 13Fri, 13 Mar 2026 12:24:27 GMThttps://devzone.nordicsemi.com/thread/563212?ContentTypeID=1Fri, 13 Mar 2026 12:24:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:340d687f-c3ca-4a47-8548-5855364daeedJostin<p>Hello,</p> <p>I confirm that the SIM card worked well when using AT Commands</p> <p>Now,&nbsp;I am using <code data-path-to-node="4,0" data-index-in-node="33">nrf_modem_at_printf</code> to send AT commands directly from the application and it&#39;s working perfectly.</p> <p>Best regards,</p> <p>Jostin</p> <p></p> <p><img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/Client_5F00_VSCode.png" /><img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/Server_5F00_Spyder.png" /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/563204?ContentTypeID=1Fri, 13 Mar 2026 11:42:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:856783b5-23ec-4e2c-a637-3175ccedca1bSimon D-M<p>Hi,</p> <p>Has the SIM card worked on some other sample or is this the first sample you tried ?</p> <p>Also, Can you please provide some modem traces (<a href="https://academy.nordicsemi.com/courses/cellular-iot-fundamentals/lessons/lesson-7-cellular-fundamentals/topic/lesson-7-modem-trace/">link</a>)?</p> <p>Best regards,</p> <p>Simon D-M&nbsp;</p><div style="clear:both;"></div>