From within the Settings app, scroll to About phone
Tap About phone.
Scroll to Build number.
Tap Build number seven times.
You may be prompted to enter your device PIN or password. When Developer options has been enabled successfully, you will see a message at the bottom of the screen which states You are now a developer!
Press the Back button.
Tap System.
Tap Developer options.
Scroll to USB debugging.
Tap or slide the USB debugging switch to ON.
Tap OK.
You've completed the steps!
