@BookCat, thank you for the lesson ;-)
I think I didn't write really clear what I wanted to ask. I have PW for rather some years. I want to avoid firmware updates and book pushed to my over the WiFi. I like however use Koreader to load my books from calibre over wifi. Or some other sync options I am working on over the wifi.
Question was will de registering of my Kindle PW from Amazon be sufficient for avoiding those firmware upgrades?
Thanks
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