How to Install Android Marshmallow on LG G3


The LG G3 was LG’s flagship smartphone of the year 2014. The phone was wildly popular, and at that time, featured the best of what the markets of smartphone technology had to offer. The device competed with the likes of the Samsung Galaxy S4, and was among the best performing devices of the year. When the LG G3 released, it came running on the Android 4.4 KitKat OS. However, last year, the Android Marshmallow update for LG G3 was also released.

Android 6.0 Marshmallow OS came out in late 2015 and currently, holds over 31% of the total Android OS market share. LG released the Android Marshmallow update for LG G3. It initially began to roll out in January and continued to roll out over the entire year. By the August of 2016 most variants and regions had received the Android Marshmallow update for LG G3. In case you are still on an older version of the Android OS, here’s a detailed guide on how to update your LG G3 to Android Marshmallow OS.

Install Marshmallow on LG G3

Before you begin to install the Android Marshmallow update for LG G3, there are some things that need to be kept in mind. Let us take a look at the pre-requisites that you need to install the update.


  • You must ensure that all the data that you have on your phone is safely backed up on your computer. There are times when during OS upgrades, data might get lost or wipe out. Ensure you have all your data backed up before you proceed.
  • Following that, ensure that your phone has sufficient amount of battery. We would recommend that you have 100% battery or at least a minimum of 60% to ensure that the phone does not power off due to lack of battery while the update is being installed.
  • Download and install the LG USB drivers from the LG website.
  • In order to install Android Marshmallow update for LG G3, your phone needs to be on the latest version of the Android Lollipop OS.

LG G3 Marshmallow Installation Steps

  • You will need to download and install a tool called the LG Flashtool. This will help you easily install the OS on your phone from your PC.
  • Following that, download the official stock package of the Android 6.0 Marshmallow update for LG G3 from the LG website.
  • Open the LG Flash tool that you have just installed. Turn off your LG G3, get into the ‘Download Mode’ – this is accessed by pressing the volume up button while you connect your phone to your computer via the USB Cable. You will now notice a dialog box on your screen saying ‘Firmware Update’.
  • Select the .kdz file in the LG Flash Tool. Select ‘Normal Flash’ if your phone is running the default/stock OS update. If your phone is running a custom ROM you will need to select ‘CSE Flash’.
  • You will now be shown ‘Read Phone Information’. There, click on start to proceed. Some users might also be asked for admin permissions. Accept it, and continue.
  • You will then need to select your country and language, there choose ‘different’ and ‘English’. Do NOT click on the smartphone upgrade check box. Ensure that it remains unticked, and click OK. This will now start the Android Marshmallow update for LG G3.
  • After your progress reaches 100%, you may receive a message stating connection to the server failed. Do not worry, this is normal. Do NOT disconnect your phone yet. Wait for the COM writer to appear in green on your phone.
  • Your phone will now be automatically rebooted. The entire process of installation of Android Marshmallow OS on your phone might take as many as 10 to 15 minutes. Ensure that you are following the instructions properly.

Bonus Tip: Install Android Nougat OS on LG G3

Usually, it is quite strange for such an old smartphone to get new updates. The LG G3 is 3 years old. However, there have been various speculations that the phone might be getting the Android Nougat OS update as well. Reports from tech times claim that the update was spotted on a Geekbench listing in the October of last year. However, since then, there has been no movement on the same.

While the Android Nougat OS update is not available for the LG G3, the users who insist on installing a newer version of Android on their phone will have to rely on custom ROMs. The CyanogenMod 14 and Lineage OS 14.0 (Nougat) are available for the LG G3 which can help upgrade your smartphone. Here’s a guide which will help you flash Lineage OS on LG G3



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