https://devzone.nordicsemi.com/f/nordic-q-a/5487/dfu-can-not-completeHi, Recently, the DFU of the "Master Control Panel" (Android) can not complete the upload mission. But, the DFU of the nRF-Toolbox in iOS is work well. Old version MCP work well. Information: Android 4.4.2 Firmware Sizeen-USTelligent Community 13Tue, 14 Nov 2017 10:43:53 GMT