https://devzone.nordicsemi.com/f/nordic-q-a/86493/bank1-contains-old-fw-image-after-dual-bank-otaNRF52840, SDK, nrf5-sdk-17. This could be a misunderstanding of how the dual bank update works, however I am finding that after an OTA, Bank0 contains the new fw image but Bank1 contains the old image. My understanding was that Bank1 overwrites Bank0en-USTelligent Community 13Thu, 31 Mar 2022 17:22:47 GMThttps://devzone.nordicsemi.com/thread/361099?ContentTypeID=1Thu, 31 Mar 2022 17:22:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64b700db-0403-42c9-a5a6-0f4978bde532terrygreasewel<p>I think this is just remnants of bank1, not actually the og fw in bank0. Bank0 increased in size so it overwrote what was left in bank1, and bank1 is not erased after the dfu.&nbsp;</p><div style="clear:both;"></div>