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Here I have Samsung Galaxy S4 and let me show you how to use secret codes on the following device
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So at the very beginning let me start from the home screen. Let's find and select phone icon, it's in that corner right here
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And as you can see the phone's dialer just pops up in front of you. So now let me start by checking a version of the device
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Let's input the following code, star hash, 1, 2, 5, 8, 0, star, 3, 6, 9, hash
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And as you can see the main version of the device just pops up. In order to close this window simply use your back arrow
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Now let me show you how to open the test menu, the test mode
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So let's input star hash, 7, 3, 5, 3, hash. And the test menu just pops up
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You can test here some interesting features, for example the vibration, speaker, camera
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And other features such as bluetooth, sensors and some other stuff. If you would like to quit this mode let's use your back arrow one more time
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And now let me show you how to open another testing menu. Let's just input star hash, 0, star hash
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And the following menu just pops up. You can test here for example the screen, the colors of the screen, green for example, blue
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For instance you may check the speaker also from the following menu, the LED
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And if you would like to quit this mode let's use your back arrow one more time
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And now let me show you how to open the service mode. Let's input star hash, 0, 0, 1, 1, hash
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And service mode just pops up in front of you. You can read some specification about your service
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Let's go back and now let me show you how to check the battery status
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Let's use star hash, 0, 2, 2, 8, hash. And the battery status just pops up
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You can read the battery level, battery blocks, battery volume and some other stuff
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Let's go back and now let me show you how to check USB settings
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Let's use star hash, 0, 8, 0, 8, hash. And the USB settings just pops up
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You can for example change the mode of your USB and reboot your device
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And at the end let me show you how to check the email number by using a secret code so
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let's use star hash, 0, 6, hash. And the email number just pops up
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To close this window simply tap OK. Excellent, thank you for watching, please subscribe our channel and leave thumbs up
