https://devzone.nordicsemi.com/f/nordic-q-a/23123/bootloader-is-not-updated-after-dfu-completes-single-bankIn single bank mode, need upgrade bootloader by DFU. Performing below procedure, APK shows &quot;transfer complete&quot;. Application on target device is disappeared, but bootloader is still running with older one. We made some changes to tell new bootloader fromen-USTelligent Community 13Wed, 09 Aug 2017 01:28:43 GMThttps://devzone.nordicsemi.com/thread/90955?ContentTypeID=1Wed, 09 Aug 2017 01:28:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c776b054-d829-4c90-9dd0-ab171cacf9adLouis<p>No more check this issue. We have alternatives to do what we want. This ticket can be closed.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/90956?ContentTypeID=1Wed, 02 Aug 2017 14:45:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb0af8ac-b07c-4738-bdd8-cfbf6ac46904Hung Bui<p>Hi Louis,</p> <p>Do you still have the problem ?</p> <p>I don&#39;t see the point of generate bootloader setting with bootloader-version = 2 then merge it to the bootloader and then generate .zip file with bootloader-version 3.</p> <p>If you can capture a log or <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF-Sniffer/">a sniffer trace</a>, it would be easier to see what could be wrong.</p><div style="clear:both;"></div>