At this point, there won't be an 8th beta. Multiple countries have started the roll out of the finished version, and I believe the only thing we are waiting for now, is the freaking carriers to start releasing... Rumor is, Canada will start the S10 series at some point today (Now that its after midnight, its officially the 16th). How much truth there is to that, we will have to wait and see, but Now the Stable finished version has to go to the carriers for approval, if not done so already, for their testing with their each specific networks...
