All Android devices feature a Developer Options menu that houses a couple of advanced settings such as USB debugging, apps side loading, and CPU usage. The Developer Mode is disabled by default in Android versions 4.2 and later, but here's a quick tutorial on how to reenable it.
N.B. This tip applies to most, if not all, Android devices.
Enable Android's Developer Options
Tap on Apps > Settings > About device and search for an entry called Build Number.
Tap seven times on the Build Number. A message reading "You are now a developer" will be displayed.
You may now go back to the Settings menu to access the Developer Options.