No matter if I go through the setting to disable the WiFi or press the WiFi button on the side, the WiFi will always come back on and turn the camera back on if it was off.
This is absolutely driving me crazy.. everytime I want to use the camera the battery is drained because the WiFi mysteriously turned back on.
For what I paid for this camera and the "extras" I would expect it to actually work as I have set it up to work. These types of issues are very elementary and you would think with a company the size of GoPro they wouldn't release a product with such issues. Poor product development on their part.
Other misc issues:
Touch screen doesn't show the options (such as the trash can) all the time on the screen... you have to press over and over for the trash can to appear
Won't turn on sometimes
Won't acknowledge when plugged into PC/Mac
This product is a huge struggle and I have no confidence in it at all.
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Not sure if you figured this out or not. I'm assuming you did since it's been a year since you posted, but I was having this same issue and I found that it was because even if I turned GoPro off and the WiFi on the GoPro off, if I was still connected to the camera via the app on my Mac (and I suspect the same would stand for connection through the iPhone app) it was rebooting the WiFi connection on the GoPro. Once I disconnected my Mac from the GoPro, once I turned the WiFi button off it stayed off.
Hope this helps.