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Here I have Samsung Galaxy A80 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 fonts dialer
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and let's start by checking the firmware version. So let's use asterisk pound, 1, 2, 3, 4 pound and as you can see the firmware version just
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pops up so you can read the AP version, CP, CSC and the exact model
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Let's go back, you can also open here the advanced test menu, so let's use asterisk
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pound, 0, asterisk pound and as you can see here you can test your device, you can test
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your display, for example the red color, green, you can test blue color, you can also here
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make sure that your receiver is working correctly, you can test the vibration, speaker and other
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stuff as well. Let's go back to quit the testing menu, now it's time to open the service menu, the service
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mode, so let's here enter the following code, asterisk pound, 0, 0, 1, 1 pound, as you can
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see service mode just pops up, here you can check out those information, you can use more
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key to use the following options and you can also go back and enter the advanced service
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mode, let's use here the asterisk pound, 2, 6, 8, 3, 6, 6, 2 pound and here we've got
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more information as well, you can also use the following more key and now you can also
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enter the battery status, so let's enter the asterisk pound, 0, 2, 2, 8 pound and battery
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status pops up, you can also here check the USB settings, so let's use this code, asterisk
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pound, 0, 8, 0, 8 pound and here you can change USB mode
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You can try to open the advanced firmware version, let's enter the asterisk pound, 2
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6, 6, 3 pound and you can check the firmware info right here and at the end let me show
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you how to check IMEI number by using secret code, so let's use asterisk pound, 0, 6 pound
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and IMEI number and also the serial number pops up, tap OK to close this window
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