Hi
I have a EU model of the Avic F900, and I installed the US 2.0 firmware on it. It stopped working, and was turning on and off by itself. So, I sent it on a warranty-fix, and got it back.
It is now working as it did before the 2.0 update, had 1.9 at the time.
Today, when playing around with it.. I discovered that I still have 2.0 on it.
Haven't yet asked the warrantyshop who fixed my Avic, but is there a working 2.0 EU firmware for AVIC F900/700? At least not according to Pioneer websites.