https://devzone.nordicsemi.com/f/nordic-q-a/86831/nrf9160-sip-modem-firmware-downgrade-preventionHi I&#39;m looking for a clear statement about to do or not do modem firmware downgrades on production devices. I know that nrfxlib does not mention anything about modem downgrades AT%XPRODDONE shall be sent after customer production is done.en-USTelligent Community 13Mon, 11 Apr 2022 08:05:44 GMThttps://devzone.nordicsemi.com/thread/362764?ContentTypeID=1Mon, 11 Apr 2022 08:05:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81c7cac3-be7e-4543-9155-53070d294467JONATHAN LL<p>Hi,<br /><br />In the MF download section you can see the notes that is included. From MF v1.3.0 a above we have the following statement: &quot;<strong>After you upgrade to MFW 1.3.0 it is not recommended to downgrade to mfw 1.2.x or mfw 1.1.x.(potential file system issues)</strong>&quot;<br /><br /><br /><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1649664232617v1.png" alt=" " /><br /><br />Regards,<br />Jonathan</p><div style="clear:both;"></div>