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Here I have Samsung Galaxy Note 9 and let me show you how to use secret code on the
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following device. So at the very beginning let's start by using the phone's dialer
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Let's activate the keypad and let me use the first secret code. So let's enter the firmware version
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So you have to use asterix hash, 1, 2, 3, 4 and hash
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As you can see the version of the device just pops up. Here you can read the AP number, CP number, CSC and the exact model of the device
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Let's go back and this time let me show you how to open the main version of the phone
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So let's use asterix hash, 1, 2, 5, 8, 0, star, 3, 6, 9 and hash
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As you can see the main version pops up. Here you've got access to AP number, CP number as well and also other stuff right here
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Let's go back. This time let me enter the test menu. So let's use asterix hash, 0, asterix hash
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As you can see the following test menu pops up. Here you can test your screen
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The red color, green, blue. You may test the receiver, vibration, camera, sensor, touch, speaker, subkey, front camera
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the LED, as you can see red light, green light, blue and the end
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You may also test other stuff such as the S-Pen, loop, back, black light and a lot of more
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Let's go back. Let me quit the testing menu by using the back key
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Let me also make it brighter. Alright. Now let's use the service mode
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You have to enter the asterix hash, 00, 11 and hash. As you can see service mode just pops up
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Here you can use for example more key in order to for example input the key if you'd like to
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Use the back key to close the service menu. And this time let me show you how to open the battery status mode
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You have to use the following code asterix hash, 02, 28 and hash
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As you can see battery status pops up. Here you can read the current value, the voltage, battery level, level blocks, current charger
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and other stuff as well. Let me go back. And this time let me show you how to open USB settings menu
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So you have to use asterix hash, 0808, hash. As you can see here you can change the USB mode
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Just tap on appropriate options and you can tap OK or reboot
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Let me go back. And this time let me show you how to check out the advanced firmware version info
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So let's use the asterix hash, 26, 63 and hash. As you can see firmware version pops up
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Here you can read all of the following info. For example the WiFi version, Bluetooth version, sensor and other stuff as well
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Let's go back. At the end let me show you how to check email and serial number by using a secret code
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So let's use asterix hash, 06, hash and the following window pops up so you can read the
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email and serial number and you may also use the barcodes to this number
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If you would like to close this window just tap OK. And basically that's it, everything went well
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