https://devzone.nordicsemi.com/f/nordic-q-a/94263/difference-using-xfssync-and-cfun-0According the data written to NVM, is there a difference between &quot;%XFSSYNC&quot; and &quot;+CFUN=0&quot; ? Reading the documentation, I see mainly user configuration be written. I may be wrong, but I assumed, that also some information about the last found networksen-USTelligent Community 13Fri, 25 Nov 2022 20:08:03 GMThttps://devzone.nordicsemi.com/thread/397729?ContentTypeID=1Fri, 25 Nov 2022 20:08:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3c3341fd-9603-4d98-9190-ddae63eb90deAchim Kraus<p>Thanks!</p> <p>&gt; When using PTI firmware, this command must be used instead of AT<br />+CFUN=0 to store configuration data to NVM.</p> <p>so it&#39;s also vice versa, when <strong>not </strong>using PTI firmware, +CFUN=0 must be used.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/397647?ContentTypeID=1Fri, 25 Nov 2022 12:44:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4fa2b579-caff-4153-ac7e-03bbc37410d5H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>When devices are delivered from us, they come with a production test image (PTI for short) fw.</p> <p>This is a restricted modem firmware used for physical testing only, ie. setting coex/antenna configuration and so forth.</p> <p>&nbsp;</p> <p>%XFSSYNC is only available in PTI firmware, which you always want to overwrite with your expected&nbsp;MFW version, where CFUN should be used instead.</p> <p>This is shown in the documentation for the XFSSYNC AT command:&nbsp;<a href="https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/production_test/xfssync_set.html?cp=2_1_10_8_0">https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/production_test/xfssync_set.html?cp=2_1_10_8_0</a></p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>