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Here I have Xiaomi Mi Mix 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 by using a phone icon to open the phone's dialer and
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here you can input all secret codes that you know. Let's start by using a testing menu so let's input star hash, star hash, 4636, hash star
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hash star. As you can see testing menu just pops up, here you can choose the phone information
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for example when you can read all specifications about your device such as email number, phone
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number and current network. Let's go back, you may choose the battery info when you have all important information
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about your battery such as battery temperature, battery technology, battery health. Let's go back, you may also choose usage statistics and here you have statistics about your apps
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this is the list of applications and you can read such things as usage time and last time used
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Let me go back and you can choose also the wifi information
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When you have wifi happy here you can disable network, disconnect network, enable network
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get configured network or get connection info. You may also choose wifi config when you have all configured networks, in my case it's none
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right away and you have also wifi status. When you have all statistics about your wifi you can refresh all stats or run a ping test
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Let me go back a couple of times just to close the testing menu and now let me show you how
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to open the hardware test mode. So we have to input star hash, star hash, 64, 663, hash star, hash star and the hardware
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test just pops up. You can for example choose vibration and choose for example short vibration, long vibration
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and choose either pass or fail. You may choose the call test for example, the front microphone speaker, some speaker
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feedback test and other stuff. As you can see here we've got the results, you may for example check version info, right
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here, here we've got the serial number, email number, build number, some signature and other stuff
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You may also test the display, the light sensor, headphone buttons, wifi and other stuff
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Let's go back by using your back arrow and now let me show you how to open the calendar info
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Let's use star hash, star hash, 225, hash star, hash star and the calendar info and
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calendar details just pops up. Let's go back by using your back arrow
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You may also check the google play services mode, so let's use star hash, star hash, 426
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hash star, hash star. As you can see google play services just pops up, here you can choose ping, connect, disconnect
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or events. Let's go back and let me open debug UI, so let's use star hash, star hash, 759, hash
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star, hash star. As you can see debug UI just pops up, you can here for example choose view client's
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ID's and read specifications and you can choose OEM mode. Let's go back
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You may also choose and open the email mode, let's use star hash, 06, hash and the email
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mode just pops up. Let's tap ok to close it. Excellent. That's it
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