How to enable Developer Mode (USB Debugging Mode) on LG G3 (F400, F400S, F400K, F400L)

In order to test the development on a physical LG G3 device, it’s crutial to enable USB Debugging Mode (USB Debugging Mode). This is how you can do it.

  • On your LG G3, go to Settings:Screenshot_2014-07-13-07-00-57
  • Switch to General tab at the top of the screen
  • Scroll right down to the bottom and select: About Phone:

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  • Select: Software Information:

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  • Find the Build Number option and press it 8 times
  • You’ll see a toast message saying: You’re now a developer!

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  • Once done, go to: Settings, General tab again and select: Developer Options
  • If you get any warning, just press OK button
  • Put a check mark on: USB Debugging (just press OK if you get a warning again). Note: you have to make sure your LG G3 is not connected to a computer to enable USB debugging. If it is connected to a computer, “Enable USB Debugging” will be grayed out.
  • Screenshot_2014-07-13-06-56-35

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