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8 thoughts on “How to Update LG G3 D855 to 6.0 Marshmallow Official”
  1. If I want to do a clean install, should I choose Refurbish or Upgrade in the LGUP window?

  2. Hello,

    I’m having the exact same problem. I’ve already installed the usb drivers, and made sure my D855 is in USB debugging mode. Still, model is still Unknown.

    Any ideas?

    1. Are you using a custom ROM or stock ROM?
      If you’re on a Custom ROM, try this, at your own risk. Edit build.prop to change ro.lge.swversion: and ro.lgeswversion short to the correct model and rom addition so lgup can identify the phone.

  3. Hi,

    When I connect my phone LGUP, it shows my model (Unknown) and I cannot proceed. What can I do about it? Please note that I have the D855 Model.
    Thanks in advanced!

    1. Did you install lg usb drivers on your pc. If not, then install lg usb drivers and then try.

      1. Hello, good night.
        So, I install LG USB drivers, but keep shows “Unknown” on the label Model.
        Do you know what happend?
        Sorry my bad english.

        1. Are you using a custom ROM or stock ROM?
          If you’re on a Custom ROM, try this, at your own risk. Edit build.prop to change ro.lge.swversion: and ro.lgeswversion short to the correct model and rom addition so lgup can identify the phone.

    2. Are you using a custom ROM or stock ROM?
      If you’re on a Custom ROM, try this, at your own risk. Edit build.prop to change ro.lge.swversion: and ro.lgeswversion short to the correct model and rom addition so lgup can identify the phone.

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