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In front of me is Samsung Galaxy S21 FE 5G and let me show you some of the secret codes
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that you can use on this device. So first of all, just open your phone dialer and let me start with the first code which
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is asterisk pound, 06 pound. And as you can see, this one will provide you with email and serial numbers assigned
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to your device. Let's go back. And now we can provide another code
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So let's enter asterisk pound, 0 asterisk pound. And here we've got test mode
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It's actually my favorite code. And here you can test all your features
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So let's start with the display. So all the colors. So we've got a red, green, blue, and black right here
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You can test them if they are working properly. So let me check it
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So it's definitely fine. Green. Also good. Blue. Perfect as well. Black
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Also pretty cool. To switch off black, you need to tap on power button
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Then you can check the speaker
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So it's definitely working properly. Then you can check anything you want like vibration, receiver, sensor, touch, version
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and so on. Let me go back. And now let's provide another code which will show us the battery status
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And it is asterisk pound, 0228 pound. And here we've got the battery status
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So if you would like to check the current value and average value then to compare it
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you can smoothly provide this code. Let me go back. Then if you would like to manage USB settings, just enter asterisk pound, 0808, and pound
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at the end. And here you've got all USB settings. So smoothly tap to change it
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And then tap on OK. And this is it. Then to check the firmware version, provide asterisk pound, 1234, and pound at the end
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And here you can check the firmware version of your device. And then to check the advanced firmware version, provide asterisk pound, 2663, and pound at
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the end. And here you've got it. So actually that's all. These are all codes that I wanted to share with you today
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Use them as often as you need to, as you want to. Thank you for watching. Please subscribe to our channel and leave the thumbs up
