A simple utility for SHV-E210S which is a Korean version of Galaxy S3 LTE.
By tapping buttons, you can reach to SKT Hidden menu, RadioInfo & UltraCfg Network settings.
No Secret code and password are required.
Only for SHV-E210S (SK telecom) which is a Korean version of Galaxy S3 LTE.
Tested on firmware version LG3 (Android 4.0.4).
"RadioInfo" doesn't work on JB(Android 4.1). It works on ICS(Android 4.0) only.
Ver 3.0 ; Correct typo on "UltraCfg network Settings" button.
Ver 2.0 ; Add "for ICS only!" on "RadioInfo" button.