b758e25a_s___Smartphone_Review_and_Tips__Function
[Code] *#*#7262626#*#* [Description] Not supported by all units, will display a list of options for you to test and there is an option to log the information as well. [Function] 
Field Test
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T e s t i n g M o d e – P h o n e S e t t i n g
F i e l d T e s t
P U K u n l o c k
D i a l e r L o g E n a b l e d
D i a l e r L o g D i s a b l e d
Android secret codes | Smartphone Review and Tips
Function