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Here I have HTC, Desire 12 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. Let's open the fonts dialer, let's activate the keypad and now you can use all secret codes that you know
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So let's start by using the HDC function test mode. So you have to input the following code, asterix hash, asterix hash
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3, 4, 24, hash asterix. As you can see the HDC function test mode pops up
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Here we've got the instructions and information tab accept these terms. And now you can use this mode
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So you can here test a couple of useful features. For example, you can test your vibrator
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All you have to do is click on your test and tap run
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Tap start. And now you are testing the vibrator. If it works normally, tap yes
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Alright, let me go back. You can also test other things such as for example the buttons of your device tab run
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And let test the buttons right here Everything works normally You can also test the audio Bluetooth charger lead Wi blacklight flashlight and other stuff You can also select all and perform all tests
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So it's recommended, for example, when you are buying a secondhand phone
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or if you are selling and you would like to have sure that your device is working correctly
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Let me unselect it. You can also choose more, and here you've got a couple of useful features
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Here you've got more tests, such as are the... battery test for example you can also accomplish here the factory data reset you can
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see here device information let me tap it you may also enter here the save mode if
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you would like to or you can check the software version that's it let's go back
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then you quit the htc function test mode now it's time to enter the Android
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testing menu so let's use this code asterix hash asterix hash 4636
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hash asterix as you can see the following test mode just pops up here you can navigate
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by tapping appropriate options you can choose phone information and read such stuff as
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email number signal strength voice service data service the roaming status you can also here run a ping test or choose more key in order to select radio band if you see my dress book view fixed dialing numbers get PDP lists or enable data connection
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Alright, let's go back right here and you may also use usage statistics
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Here you've got the list of all apps and you can read such stuff as last time use and usage time
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Use back key again and let's open the Wi-Fi information. Here you can open the Wi-Fi API
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When you can disable network, disconnect network, enable network, get configured networks or get connection info
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You may also go back and choose Wi-Fi config and here you've got the information about configured networks on this device
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You may also select from the following list the Wi-Fi status and here have got the statistics about your Wi-Fi
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You can refresh them or run a ping test. Use a bug key a couple of times just to quit the Android testing menu
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and this time let me open the calendar menu so let's use the following code
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asterix hash asterix hash 225 hash asterix as you can see the calendar info just pops up
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you can read here the information about your events all right use back key again
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to quit this menu and it time to open the Google Play service so all you have to do is input the following code asteris hash asterix hash 4 to 6 hash asterix hush
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and this is the Google Play service here you've got access to ping connect disconnect
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or events right here and status use bug key one more time and now let me enter the
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debug UI mode So let's use this code, asterix hash, asterix hush
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759, hash asterix, hash asterix. And the debug UI just pops up
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Here you can view client's IDs, for example, let's tap close. You can also change your EM mode if you would like to and use other stuff
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So let me quit this mode and at the end let me show you how to enter the email menu
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So you have to use the asterix hash, 06, hash. And the email mode pops up, tab okay to close this
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So let's go back to use the home screen and basically that's it everything went well
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