Hi, (OP new member introductions) I purchased a used zt-180 from a pawnshop near my home in Kingman AZ. under about device: It says zt180 andriod _2.2 kernel 126.96.36.199 build zt180-eng AOSP OPENMASTER eng.root.20110503.120935 120935 test-keys. I found this forum via a yahoo search for the zt180. I'm a retired Motorola process engineer. I'm looking to understand how to improve this tablet like: why the +- toggle does not control volume and why the button is a back key instead of a home key if I should revert back to an older android version as I can't seem to find 2.2 info for this tablet. Fyi I have other tablets/smartphones so I'm not really a beginner. I've got a Dell Streak 7, Motorola Droid, Motorola Droid-x, and 2 ipod touches. Some of which I've given to my daughter and grand daughter.