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Here I have Xiaomi 3S and let me show you all secret codes that works on this device
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At first let's unlock the screen, open the fonts dialer and here you should input all
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secret codes that you know. Let's start with the following one, star, hash, star, hash, 64, 66, 3, hash, star, hash, star
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As you can see engineering mode just appears on the screen. Now you can choose automatic test, single item test, test report or for example device view
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Let's go back to the fonts dialer and here you should input another secret code, star
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hash, star, hash, 46, 36, hash, star, hash, star. And as you can see testing menu just appears in front of you
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You can read phone information for example when you have all important stats about your device
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From that point you can run a ping test or for example turn off the radio
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You can go back and choose battery info, here you've got all important stats about
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your battery. You can read battery level, battery health or even battery temperature
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Let's go back and let's choose usage statistics. Here you've got all important stats about your application
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You can for example read usage time of all application from your phone
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Let's go back and the last option is Wi-Fi information, here you've got Wi-Fi API, Wi-Fi
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config or Wi-Fi status. For instance let's choose Wi-Fi status, here you've got all important statistics about
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your network. You can refresh all stats or run a ping test
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Let's go back and now let me open a fonts dialer one more time and let's open calendar
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information by using the following code star, hash, star, hash, 2, 2, 5, hash, star, hash, star
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As you can see calendar info just appears on the screen. For example you can read calendar display name birthday
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Let's go back and now let me use a code in order to open Google Play services
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So let's input star, hash, star, hash, 4, 2, 6, hash, star, hash, star
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As you can see Google Play services menu just appears in front of you
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Let's go back to the fonts dialer and let's input code to open Google partner setup
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So let's use star, hash, star, hash, 7, 5, 9, hash, star, hash, star
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As you can see the following menu just appears in front of you
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Let's go back to the fonts dialer and in the last step I would like to show you the most
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popular and the most useful one which is star, hash, 0, 6, hash
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In that way you can check email number of your device, you can close the window by tapping OK
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