Developer Options -> Install Via Usb Still 'refuses' To Get Switched-on


Jun 6, 2018
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After following this 'untold' whole process of unlocking my brand new Redmi Note 5A MDG6, I still have this issue. My device is now unlocked, however I can't switch-on the 'Install via USB' option. I've tried almost any googled suggestion, but no success. I bought this phone especially for my development needs (Android Studio), and it remains unusable. It's a pity spending so much unproductive time... Please, help...

NO Problem any More ! Solved!
 
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