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Here I have Xiaomi A2 Lite and let me show you how to use secret codes on the following device
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So at the very beginning let's start by using the home screen. Let's open the phone dialer and let's start by entering the hardware test mode
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So here you need to input asterisk hash, asterisk hash, 64, 663, hash asterisk, hash asterisk
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As you can see the hardware test pops up. Here you can check a couple of useful features such as the version info
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So let's read the following information and make sure that everything is correct
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So if that's so let's tap pass. Now the light sensor is activated
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Now you can use the proximity sensor and other stuff as well
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You can also go back and for example choose one of the following tests such as the magnetic
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sensor, the receiver, the headset, speaker, the camera, the scene detection, SD card
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WiFi, GPS, Bluetooth and other stuff. You can also use more key and here use some additional test
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Here you've got the other menu. If you would like to quit this mode let's use the back key a couple of times
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And now you are back in the phone's dialer so now let me enter the Android testing menu
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So all you need to do is enter the following code. Asterix hash, asterix hash, 46, 36, hash asterix, hash asterix
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As you can see the testing menu pops up in front of you. Here you can navigate by tapping appropriate options
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Let's choose phone information and here for example you can read such stuff as signal
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strength, voice service, data service, data network type. You can also run a ping test or choose more key in order to select the radio band, view
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SIM address book, view fixed dialing numbers, view service dialing numbers or enable data connection
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Alright, let's go back. You can also choose usage statistics and here you've got the following list of apps when
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you can read the last time used or usage time. Let me go back
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Here you can also choose WiFi information and here you may use WiFi API when you can
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disable network, disconnect network, enable network, get configured networks or get connection info
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You can also use WiFi config and see the following configured networks
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You may also select the WiFi status and here you can refresh all stats or run a ping test
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Alright, let's go back a couple of times. Now let me enter the following code
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Asterix hash, asterix hash, 225, hash asterix, hash asterix. As you can see the following calendar info pops up so here you can read a couple of useful info
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Let's go back again and this time let me open the Google Play services so let's enter the
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asterix hash, asterix hash, 426, hash asterix, hash asterix. So the Google Play services pops up in front of you
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Here you can tap ping, connect, disconnect, events or status. Let's go back again and this time let me open the debug UI so let's enter the asterix hash
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asterix hash, 759, hash asterix, hash asterix. And sometimes the debug UI may pops up in front of you
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It depends of the version of the device that you are using. At the very end let me show you how to check the email info by using the secret code so
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let's use this code asterix hash 06 hash and the email information pops up in front of you
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Tap OK to close it and basically that's it. Now you can go back and use your device in a normal way
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