The 8.9-inch Windows 10 tablet Onda V891w CH with additional Android 5.1 dual-OS inside, is now on sale from Geekbuying for $99. This is a rare tablet size these days, and especially among Windows tablets, where the 8.9-inch Windows tablet Asus Transformer T90 Chi is the best known one. But the T90 Chi tablet was exceedingly difficult to get hold of in the US, despite its popularity in many Asian … more…