Turn on USB Debugging to help trouble shoot your device. Once USB Debugging is turned on, you will be able to plug your device into a computer to access your device's logs.
From the Home screen, drag down the Notification panel.
Drag down the Quick settings panel.
Tap the Settings icon.
Scroll to About phone.
Tap About phone.
Scroll to Build number.
Tap Build number seven times.
Note: 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 Developer mode has been enabled.