I’m aware of Symbian, it ran on over half of the world’s smartphones before 2009. It’s not some hidden knowledge.
You’re the one who said it had zero innovations, which is patently false. Here’s a short piece from AllAboutSymbian.com on the topic. I never claimed they invented the smartphone or anything like that, but it’s obvious that you think I did that since you added that part about the tablet.

This conversation is not worth my time, I do not care what you think. Have a nice day!