https://devzone.nordicsemi.com/f/nordic-q-a/6689/initial-start-up-method-in-the-case-of-using-the-dfu-bootloderHi I wrote a softdevice, bootloader and application using the nRFgo Studio. When I turn on the device, bootloader_settings_t is all 0xFF so bootloader_app_is_valid returns false. Therefore bootloader is will start. I want to start with my applicationen-USTelligent Community 13Mon, 27 Apr 2015 04:22:53 GMThttps://devzone.nordicsemi.com/thread/23462?ContentTypeID=1Mon, 27 Apr 2015 04:22:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5a9a58ce-7074-4603-85e1-0e768bcbaceftalby<p>Thanks for the reply.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/23461?ContentTypeID=1Fri, 24 Apr 2015 07:46:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3d24e3ed-93e7-4af8-b074-0ef9bb6c9325Alex<p>Here is full answer <a href="https://devzone.nordicsemi.com/question/22056/combining-sd-dfu-and-application-hex-and-programming/">https://devzone.nordicsemi.com/question/22056/combining-sd-dfu-and-application-hex-and-programming/</a> how to combine all files including valid application settings file and program using nrfjprog</p><div style="clear:both;"></div>