I was reading some of the Tmall reviews of the upgraded Teclast X89 (formerly the X89HD), and more than one customer remarked that the base speed of the CPU isn’t the touted 2.16GHz but a measly 1.33GHz. One person included a photo as proof:
That’s less default speed than the original X89HD, which was reported to run its CPU at its full 1.83GHz peak frequency.
There are over six hundred reviews of this tablet at Tmall. That’s far too much time for me to devote to a single tablet. Plus, I don’t know how objective or knowledgeable these reviewers are. Some mention they’re encountering Windows for the first time, which is hard to believe.