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Here I have Xiaomi Mi Max 2 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 home screen, let me open the phone's dialer
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by using a phone icon right here and now you should input all secret codes that you know
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So let's start by using a testing menu. Let me use the following secret code, star hash, star hash, 4636, hash star, hash star
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As you can see testing menu just pops up, here you can choose for example phone information
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When you can read such things as email number, phone number, current network, signal strength
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and other stuff you can also scroll down, run a ping test and choose more key
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Then you can choose view SIM address book, view fixed dialing numbers, get PDP list or
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enable data connection. Let me go back a couple of times and you can choose also the battery information, here
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you should find the full specification about your battery, you can read such things as
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battery status, battery scale, battery health and even battery temperature. Let's go back one more time, let's choose user statistics, here you've got all important
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statistics about your application, you can read the last time used and usage time
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Let's go back again and choose Wi-Fi information, here you can select Wi-Fi API, when you can
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disable network, disconnect network, enable network, get configure networks or get connection info
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So let's go back again, this time let me choose the Wi-Fi config and if you have some configured
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Wi-Fi networks here you should find the full specification of them, if not you should see
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the blank page. Let's go back, choose Wi-Fi status and as you can see here you can choose the network
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state, the other specific information, you can refresh all stats or also run a ping test
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Let's go back a couple of times and let me quit the testing menu, this time let me open
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the hardware test, so let's use star hash, star hash, 64, 663, hash star, hash star
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As you can see hardware test just pops up. So basically from the following menu you can perform some tests to test your features
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to test your hardware, for example the vibration, short vibration, long vibration, you should
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choose pass or fail, the microphone and other stuff. Let's go back, in my case you can also choose more key and choose additional tools right here
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Let me go back and let's go further, let me show you the other secret codes
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Now it's time to open the calendar information, so let's use the following code, star hash
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star hash, 225, hash star, hash star. As you can see the calendar info just pops up, so you can read some important detailed
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information from your calendar. Let's go back and this time let's open the Google Play service, so let's use star hash
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star hash, 426, hash star, hash star. And Google Play service just pops up, here you can choose ping, connect, disconnect or events
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Let me go back this time and let's use debug UI, so let me use star hash, star hash, 759
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hash star, hash star. And as you can see debug UI just pops up, here you can view clients IDs and you can
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change the OEM mode for example. Let me go back again and this time let's use the code that shows you the email number
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so let me enter the star hash, 06, hash and as you can see the mobile equipment identification
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just pops up, so all email numbers from this device. Let's tap OK to close this window and let me go back to the main page of this device
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and that's it. As you can see now you can use your device in a normal mode
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