https://devzone.nordicsemi.com/f/nordic-q-a/8824/dfu-not-working-for-meHi, my firmware works fine, but when I tried to do DFU using the master control apk, it would get to the download screen and then quit. This is the text: DFU version number read: 0.1 DFU Application with buttonless update found DFU Notificationen-USTelligent Community 13Fri, 21 Aug 2015 10:24:15 GMThttps://devzone.nordicsemi.com/thread/32437?ContentTypeID=1Fri, 21 Aug 2015 10:24:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:220521c5-44f8-4e98-ae08-2c323adb13f9Hung Bui<p>If IS_SRVC_CHANGED_CHARACT_PRESENT is set to 0, bootloader only works, if on the phone the user delete bond information, then turn off and on Bluetooth to clear the cache.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32436?ContentTypeID=1Fri, 21 Aug 2015 08:18:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:72696137-3c64-45b5-ba71-d5d69c6e578aMichael Wang Wenco<p>SoftDevice : S110 7.1</p> <p>SDK 7.2</p> <p>have set IS_SRVC_CHANGED_CHARACT_PRESENT 0, is disable in bootload and app ,can not changed,because the goods have saled out. can we do OTA by disable IS_SRVC_CHANGED_CHARACT_PRESENT nrf toolbox 1.4</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32435?ContentTypeID=1Thu, 20 Aug 2015 12:15:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f0cd4c7-65b9-41d4-954c-bb237963fb0aHung Bui<p>Hi Michael,</p> <p>Please edit your question and add following information:</p> <ul> <li> <p>The SDK version you use</p> </li> <li> <p>The step by step process of your testing , what do you flash first, second , etc. When do you flash the bootloader. How do you create your image .zip file (including .hex and .dat file)</p> </li> <li> <p>Have you tried to do DFU with our provided example .zip file included when you install the app on the phone ?</p> </li> <li> <p>Have you bonded the device with the phone ? Could you try to unbond, then turn off and on Bluetooth and test again ?</p> </li> </ul><div style="clear:both;"></div>