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Here I've got Xiaomi Mi 9 and let me show you all the secret codes for the following device
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So at first, obviously, you have to open the phone gallery and let's start with the truly
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short code which is asterisk pound 06 pound. And this one will provide you with email numbers for your device for both SIM cards of yours
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So click on OK to go back and this is how you can enable your email information
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Then let's go to the second code which is asterisk pound, asterisk pound 426 pound asterisk
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pound asterisk. And now you're in diagnostic mode from Google so you can check here events and status
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If you click on the more icon, you can open advanced view
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So as you can see, now we have way more information here included
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Let me go back and the third code will be asterisk pound, asterisk pound 225 pound asterisk
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pound asterisk. And here you've got all the calendar info so if you have any calendar connected with
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your Xiaomi, then all the events, birthdays and other celebrations will be included here
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so you will not forget about any of them. Then let's go to the testing mode and the code is asterisk pound, asterisk pound 4636
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pound asterisk pound asterisk. And here you can check phone information. As you can see, you've got here email number, phone number, current network, signal strength
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voice service, data service, data network time, voice call status and all the others
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You can also run ping test here and here is the solution
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So let me go back. Then you've got phone information, the second 42nd email number, it's exactly the same display
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And also you've got the Wi-Fi information here so you can check Wi-Fi APA in which you
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will notice disabled network, disconnected networks, enabled network, configured networks and also the whole connection info
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Then you've got Wi-Fi configuration where you will find all configured networks and
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Wi-Fi status. Let me refresh it and here you will see all the details regarding your Wi-Fi
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You can also run a ping test here. So let's go back and now we will go to the last code which is actually most useful one
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and it's asterisk pound, asterisk pound 64663 pound asterisk pound asterisk
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And now we are in test mode where you can test all the features that your device has
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So as you can see, you can check SIM card, you can perform keyboard test, vibrator test
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display test, receiver, speaker, main and top mic, headset test, proximity sensor, Wi-Fi
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scan, Wi-Fi address and all the others. Also light sensor, OTG, charger test, wireless charging test, rear camera and all the others
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So let me show you for example display, receiver and speaker tests
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So this one is for display, red, green, blue. It's definitely working correctly and it passed
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4, 3, 4, 3 so the receiver is working correctly as well
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9, 6, 9 and the speaker also passed the test. And then you can obviously test whichever feature you want to, whichever feature you
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need to. And that would be all. Now you can go back and start using your device
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So that is all. These are all the secret codes for your Xiaomi Mi 9
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