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Message: <blockquote data-quote="mash malinga" data-source="post: 16514909" data-attributes="member: 209988">Use the secret codes at your own risks. Because of various reasons the codes    may render your phone uselessSamsung Galaxy S4 Secret Codes,New Galaxy S4 Hidden Code                                        How to access the internal function of Galaxy S4 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 S4 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, etcTo go back use right physical button while testing the touch, TSP Hovering 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 S4* #1234# to check software version of phone.*#12580*369# to check software and hardware information.*#0228# Battery status (ADC, RSSI reading)*#0011# Service Menu<a href="http://forum.xda-developers.com/showthread.php?t=2254228" target="_blank">http://forum.xda-developers.com/showthread.php?t=2254228</a>......................................................................................<a href="http://emilights.com/blog/71-gadget-tech/809-almost-complete-samsung-galaxy-s3-s4-secret-code-list" target="_blank">http://emilights.com/blog/71-gadget-tech/809-almost-complete-samsung-galaxy-s3-s4-secret-code-list</a></blockquote>

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