Samsung Galaxy S3 Slim G3812B Secret Codes, New S Three Hidden Menu

Samsung Galaxy S3 Slim smartphone with 4.50-inch 540×960 display powered by 1.2GHz processor alongside 1GB RAM and 5-megapixel rear camera.

So, here I am going to show you how to access the internal function of Galaxy S3 Slim Edition 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 S3 Slim Edition 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 S3

1.   * #1234#              -to check software version of phone.


2.   *#12580*369#     -to check software and hardware information.


3.   *#0228#               -Battery status (ADC, RSSI reading)


4.   *#32489#             -Service mode


5.   *#7780#               -factory data reset Galaxy S3


6.   *2767*3855#       -Full factory reset (Don’t dial it does not ask you to confirm unless you have problem)

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  If factory reset codes are not working then Click Here 
  
  
  
  
  
  
  
  

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These codes will work on all the models of galaxy series