How to enable Developer options or menu on an Android Phone

On the phone, select Settings -> About Phone. Locate the option called Build number and press on it 7 times in succession.

You will then find that Developer Options is enabled in the About Phone menu.

How to put phone into USB Debugging mode from Developer Options

First enable Developer Options.

On the phone, select Settings -> About Phones -> Developer Options. Locate an option named Android debugging and change the toggle to On.

The phone will now be in USB Debugging mode.

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