Secret Codes helps you to access some internal functions of mobile which are intended for developers and troubleshooting purposes. They are the combination of numeric and Special Characters like * and #. These codes can give you access to the whole new world of hidden menu, diagnostics test and much more.
Secret Codes of Samsung S5
So, here i am going to show you how to access the internal function of Galaxy S5 for testing the various hardware parts of your phone if it is working properly or not with the help of this secret code you can test lcd, vibration, camera, sensor (accelerometer sensor, proximity sensor, magnetic sensor), touch screen, speaker, sub key, etc... if you have any hardware problem with your galaxy S5 you can identify with this code if it is working or not to do this follow the steps below.
First of all open your keypad
Then dial the secret code *#0*#.
Now you get a screen with title LCD TEST and below that you have lots of option to test various hardware parts of your phone such as speaker, sensor, lcd, etc
To go back use right physical button
While testing the touch you have to touch and mark all the squares back button does not work
Other use full secret codes for android phone tested on galaxy S5
These codes will work on all the models of galaxy series