I've bought a recent, middle (or top) category Android tablet model ZH960. It specification says 8GB RAM and 128GB flash, with an astonishing 1280x2560 display.
However, after I've tried it, it simply did not work so. It is slow (particularly using recent browsers), the display resolution is clearly worse than specified (pixels are well visible), contrary that the "Settings" -> "About this tablet" says the values specified by the reseller.
What to do? How to check it?