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Here I have HTC U12 Plus 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 your home screen. Afterwards let's find and select the phone's dialer and let's enter the secret code
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So let's start with the following one. Asterix hash, asterix hash, 3424 hash asterix, hash asterix
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As you can see HTC function test mode pops up so in order to go next let's choose accept
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terms of service and here you can perform a couple of useful tests
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You can perform the audio test, bluetooth test, charger, headset, vibrator, blacklight
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button, led, wifi, sd card and camera and a lot of more
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So let's suppose that you would like to perform the vibrator test so let's click on vibrator
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let's open this menu and choose run, tap start. If it works normally tap yes, tap stop, tap yes again and that's it, the vibrator works normally
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You can also choose select all and run all of the following tests to make sure that everything
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works just fine. You can also unselect everything with the same key
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You may also choose more and here you can perform the battery test, you can enter the
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save mode, you can perform the NFC test and a couple of useful things
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Alright if you would like to quit the HTC function test mode let's use a back key a
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couple of times right here or if it's not working you can also choose home key and then
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close the following HTC function test mode and now let's enter the android testing menu
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so let's input the following code. Asterix hash asterix hash 4636 hash asterix hash asterix
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As you can see the android testing menu pops up, here you can navigate by tapping appropriate
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options, you may choose hear the phone information and read such things as voice service, data
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service, voice network type, data network type, you can also run a ping test or choose
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more key for example in order to select radio band. That's it let's go back
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You can also see the usage statistics and you can read the following information last
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time used or usage time. Let me go back again. You can also select the WiFi information and here you can use the WiFi API when you may
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disable network, disconnect network, enable network, get configured networks or get connection info
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You can also choose the WiFi config and see the list of configured networks, you may read
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some specification from the following info. You may also choose the WiFi status, when you can see the statistics about your WiFi
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you can refresh them or run a ping test. So that's it let's go back again
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Let me quit the android testing menu and this time let me show you how to open the Google
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Play services so let's input the asterisk hash, asterisk hash, 426, hash asterisk, hash
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asterisk and the Google Play services pops up, here we can read a couple of useful information
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Alright let's go back and now let me show you how to check email number by using a secret
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code so all you need to do is use asterisk hash, 06 hash and the email number just pops
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up in front of you. So basically that's it, let's tab OK
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