For Android users to quickly open the development of personnel options,engineering mode, battery power,
background service management and other functions;and this is a secret code management tools,
such as Android phone secret code ##4636## to open mode of engineering,
as well as some MTK Enginerr mode ##3646633## code.
You can also from forums or other place to search for your phone special secret code,then used this tool to add and manage.
