Switch it all on as per the user manual. Be sure the device that you connect to the RC has data connected and then wait and see what is prompted on the top of the Dji app. If it doesn't prompt you to update, then don't worry about it.
Compared the before and after firmware and it was correct and everything works..didn't fly it yet ..too much stuff to know looks like you need to be a NASA engineer to fly it may hang it in my garage as a show piece !!!