AT+CSIM returning CME ERROR: 50https://devzone.nordicsemi.com/f/nordic-q-a/71474/at-csim-returning-cme-error-50Hi, I&#39;m trying to use the following AT command provided by my SIM card provider to switch SIM profile: &gt; AT+CSIM=94,&quot;80C200002AD1288202838106068186825347168B1A040C914437989699097FF681106251250000072A30312A313023&quot; +CME ERROR: 50 According toen-USTelligent Community 13Wed, 10 Feb 2021 10:54:36 GMTRE: AT+CSIM returning CME ERROR: 50https://devzone.nordicsemi.com/thread/293727?ContentTypeID=1Wed, 10 Feb 2021 10:54:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e2cc0389-b7e6-41fa-8dcf-267f8ad9de9floumay<p>Hi Heidi,</p> <p>I&#39;m currently using Modem FW revision: 1.2.0.</p> <p>This should probably explain why I&#39;m having issue with the AT command.</p> <p>Best regards,</p> <p>Louis</p><div style="clear:both;"></div>RE: AT+CSIM returning CME ERROR: 50https://devzone.nordicsemi.com/thread/293726?ContentTypeID=1Wed, 10 Feb 2021 10:51:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:be409280-2a3c-4d9a-b884-a8d46f742efaHeidi<p>Hi!</p> <p></p> <p>The command appears to be&nbsp;a valid SMS-PP Download, and this should work on MFW 1.2.2 and up, so the modem isn&#39;t blocking this command.&nbsp;</p> <p></p> <p>Are you using an older MFW version than 1.2.2?</p> <p></p> <p>Best regards,</p> <p>Heidi</p><div style="clear:both;"></div>