Samsung Galaxy J3 V / Galaxy J3 (3rd Gen.) - USB Debugging Mode
If you need to facilitate a connection between your device and a computer with the Android SDK (software development kit), view this info.
From a Home screen, swipe up or down from the center of the display to access the apps screen.
These instructions only apply to Standard mode and the default Home screen layout.
Navigate: Settings > Developer options.
If not available, swipe up or down from the center of the display then navigate: Settings > About phone > Software information then tap Build number 7 times.
If presented, enter the current PIN, password or pattern.
Ensure that the Developer options switch (upper-right) is turned on .
From the Debugging section, tap USB debugging to turn on or off.