If you want to know How to enable USB debugging on Samsung Galaxy M21 smartphone? make sure you watch this article till the end and you should be able to do so.
Steps for How to enable USB debugging on Samsung Galaxy M21 smartphone.
First, for this go to settings.
Scroll down to the bottom.
Find about phone tap on it then go to software information.
Now you need to tap quickly over the build 7 to 8 times to enable developer options.
Developer options have been enabled now go back.
The developer options menu will now appear in your settings menu.
You will find it under about phone tap on it now scroll down.
And find USB debugging simply toggle than a button to enable it.
From the pop-up menu select, ok. And the USB debugging has been enabled.
So in this way, you can enable USB debugging on Samsung Galaxy M21 smartphone.
So if this article helps you, please let me know in the comments if it worked and I appreciate it.