HI guys,
We finally get this Android 4.2.2 stock firmware for Tronsmart T428,you can download it here
https://docs.google.com/file/d/0B2J_Nqv8IludbzV6MzZ6MnBVejQ/edit?usp=sharing
password: geekbuying.com
and here is the firmware update instruction:
Any questions,please feel free to contact us.
Geekbuying