The Froyo rumors just keep on rolling, don’t they? BGR’s saying that the Samsung Epic 4G’s Android 2.2 upgrade is still on for the 21st. We’ve heard that one before, but that was build EA17 – EB13 is the latest and all signs point to it being final. They’re also saying the Sanyo Zio should get its 2.2 upgrade on that same day, and that it’ll roll out over a 5-day period. Sweet! Let us know if all this ends up being true.