https://devzone.nordicsemi.com/f/nordic-q-a/113146/nrf5340-cpunet-image-in-the-secondary-slot-is-not-valid-at-bt-dfuHi there During updating nRF5340 over bluetooth, really rarely the CPUNet fails to be updated over bluetooth. The mcuboot says: Image in the secondary slot is not valid! But with the exact same Smartphone, bootloader on nRF5340 and dfu_applicationen-USTelligent Community 13Thu, 18 Jul 2024 12:16:13 GMThttps://devzone.nordicsemi.com/thread/494568?ContentTypeID=1Thu, 18 Jul 2024 12:16:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c055287c-a228-4eea-8fde-f3dee89a2b2cMenon<p>Hello,</p> <p>I will attempt to test it here using a Google Pixel phone. Could you please share the entire log here using the insert tab? Also, please check if there are any error messages in the mobile application. You can view the log inside the nRF Connect Mobile App by swiping the screen to the right.</p> <p>Kind regards,</p> <p>Abhijith</p><div style="clear:both;"></div>