I have purchased the 8 GB internal and 1 GB Ram, OS Version.
To date from 3 months of use I can say that I am extremely satisfied with the device.
Most of the pre- installed apps are very useful and being to connect it effortlessly to my PC and my Display link. Has largely replaced many of Pc activities. I am very very satisfied with this device, specially knowing how cheap it was.
Comparable performance from other brand would cost me double. The only area lacking is the display is IPS would have been nice if it was led or something great value for money and yes it supports my 5 Ghz Wifi super fast charging and the earphones in the package are also very good.