How to Flash Huawei P9 Plus VIE L29 :-
Step 1: Download & extract the stock firmware on your computer.
Step 2: After extracting the files you will find the Firmware, Driver & instruction manual.
Step 3: Install the related USB Drivers skip this step if drivers are already installed.
Step 4: Follow the instruction manual to flash the firmware on your smartphone.
Download P9 Plus VIE L29 Firmware Flash File ROM