Development Settings APP
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.
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lite 
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fb lite 
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keyboard 
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