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Here I have Xiaomi Redmi Note 3 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 use the home screen, find and select the phone icon right
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here and now let's use all the secret codes that you know. So at the very beginning let's enter the hardware test mode, let's use the asterix hash, asterix
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hash, 64663 hash asterix hash asterix. As you can see the QC test pops up, here you can test a couple of things, for example software
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version, tap ok or error if everything is alright let's tap ok
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The sim test you can check, you can choose ok or error and other stuff such as color
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right here all colors of the screen and also you may test the touch panel, play music
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receive, GPS, wifi, bluetooth, light sensor, keys, back camera, front camera and a lot
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of more. You can also choose more key and choose here the wifi test tool and see the test report
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Let's go back and quit the hardware test, let's tap ok and this time let me show you
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how to use the android testing menu, let's input the asterix hash, asterix hash, 4636
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hash asterix hash asterix. As you can see the testing menu just pops up, here you can also navigate by tapping
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appropriate options, let's choose phone information, here you can read such stuff as email number
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current network, signal strength, location, roaming, gsm service, you may run a ping test
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or you can choose more key in order to view sim address book, view fixed dialing numbers
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view service dialing numbers or enable data connection. Let's go back again and this time let's choose battery info, here you've got the information
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about your battery, you can read such stuff as battery status, power plug, battery level
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battery scale, battery health, battery voltage or for example battery temperature. Let's go back again and this time let's choose usage statistics, here you've got the list
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of all applications from your device and you can read such stuff as the last time used
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and usage time. Let's go back, you can choose also the wifi information, when you can find the wifi API
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here you can disable network, disconnect network, enable network, get configure networks or get
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connection info. Let's go back again and let's choose the wifi config, if you have some configure networks
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here you should see the full specification about them, if not let's go back, let's choose
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wifi status, here you've got the statistics about your wifi, you can refresh them or you
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may also run a ping test here. Let's use the back key a couple of times, here under testing menu you can choose also
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more and select the app usage statistics, right here and let's go back to quit the android
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testing menu. So now it's time to check the calendar info, let's use the asterix hash asterix hash 225
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hash asterix hash asterix. And the calendar info just pops up, you can read about some events
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Let's go back, you may also use the google play service mode, let's use asterix hash
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asterix hash 426 hash asterix hash asterix. As you can see google play services just pops up, you can choose here ping, connect, disconnect
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or events. Let's go back again and this time let's open the debug UI, so let me input the asterix
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hash asterix hash 759 hash asterix hash asterix. And the debug UI just pops up, here you can view client's ID's
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You may also change OEM mode or for example read the current backoff
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Let's go back by using the back arrow and let me check the email number, so let's use
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the asterix hash 06 hash and the email number just pops up, let's tap ok to close this
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So let's go back and basically that's it, now you can use your device in a normal way
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