"There are two different versions of this device.
The ProQ8 without "PLUS" "+" has pre-installed the Android 4.2.2.
The PRO + Q8 (MTI "PLUS") has already 4.4 vorinstalilert.
This batch has a new motherboard, which supports Android 4.4.
The firmware versions for the previous motherboard but are not
compatible. "
Accordingly, an upgrade of the previous ProQ8 on Android 4.4 is thus
Unfortunately not possible.