Development Settings

Development Settings is a utility app that provides quick access to hidden Android testing and configuration menus.

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.