Have you gone into System Updates and pressed the Check Now button? My HD6 often doesn't even know component updates are available unless I manually check for them. I'm pretty sure the page flip feature was a component update. At any rate, Ive had page flip since mid-July when I updated to the latest Fire OS, so it is definitely available, though as I said updates apparently are not done automagically with the Fire. Nor does it seem to check for them unless I tell it too. So if you are waiting for the HD6 to magically update and give you page flip, you will probably be waiting until hell freezes over.