This paper is an independent technical guide. Always refer to the official Ddpai documentation for the most current procedures. Unauthorized modifications or use of non-official firmware voids the warranty.
Make sure the firmware file name was not changed during the download process. Ddpai Z40 Firmware Download
Launch the app and connect your smartphone to the Z40's built-in Wi-Fi network. This paper is an independent technical guide
The simplest way to update your firmware is through the official mobile application. Ddpai Z40 Firmware Download