Secret Codes of Samsung include

- Network Secret Code
- GPS Secret Code
- Bluetooth Secret Code
- WLAN test Secret Code
- Usage statistics Check Update
- Reset Device
- Unlock Phone
- Unlock the device
- Recover Forgotten pattern
- Engineering mode
- GPS test mode
- Touch Test codes
- Test Device is original or copy
- check battery timing
- Machine information
- Display Codes of phone is lock unlock
- Phone Check Codes
- Firmware version information Secret Code
- factory tests PDA
- hard rest code
- Password Forgotten
- display the IMEI number
- Super Mode
- Secret codes of every functionality
- Service Menu
- factory reset
- sim lock codes
- sim unlock code
- Phone information
- Battery information
- Wifi information code
- Battery history
- Software Information code
- Hardware Information
- Test Photograph RGB and much more.
- Screen Test

Note: This is not official Application of Samsung. And also it is read only app and does not made change to user device.
thanks you