https://devzone.nordicsemi.com/f/nordic-q-a/36261/nrf-toolbox-dfu-invalid-fileWhen I use the nRF Toolbox to upgrade the nrf52832 device on the mobile phone (huawei mate9 Android8.0), I have the following questions: The first time I opened the update package pack.zip with nRF Toolbox, and it can be upgraded successfully, but whenen-USTelligent Community 13Tue, 10 Jul 2018 08:50:53 GMThttps://devzone.nordicsemi.com/thread/139533?ContentTypeID=1Tue, 10 Jul 2018 08:50:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c9cd63d3-a527-4f1c-b681-fc7d27bd6f41sunming<p>It was happened when you use the default huawei file brower, you can try to install some other file brower, which can be used when select the OTA file, for example, ES文件浏览器, which I used to solve this problem.</p><div style="clear:both;"></div>