Hang on, so you ended up buying an Honor 8? Awesome, I hope you like it as much as I do.
As for the wide aperture mode, you will find it in the "normal" camera mode. At the top of your screen, you will see a row of icons, the second one from the far left is the right one. It's next to your flash button, and it kind of resembles the Google photos icon. When you click it some text will come up explaining how to use it. It's pretty fun to play with, you can even change focus and aperture settings after taking the picture.
Have fun!