The most popular LG smartphone in the G3 series comes with the model number D855, and now you can root the same thanks to updated SuperSU application and a custom recovery. The updated method works after you update the G3 to Android 6.0 Marshmallow by accepting the OTA notification, or by installing the file manually using the Flash Tool.

Here is everything you need to root the LG G3 D855 running Android 6.0 Marshmallow.

Related Reading: Best Custom ROMs For The LG G3 Smartphone


What Is Rooting the Android Operating System?

When you buy a new smartphone, you might not know it, but the Android operating system is in a “locked” state. For the most part, it will not make much difference to you: most apps are still available to use, and there are benefits to this locked state such as better security. When you root the Android operating system, you are gaining full administrative rights over the OS.

Why Would You Want to Root Android?

Gaining full administrative rights over the operating system has some perks to some people. For example, out of the millions of applications available on Google Play, some of them will not be able to run on your device unless it has root access. Until you have a specific need for wanting Android rooted, you probably want to leave Android as it comes out of the box. But if you need to unlock an app, then that is when you want to look into rooting methods. Using more apps is only one example of why you may want root access, here is the full list of benefits:

  • Unlock more applications. Some of the apps available for Android cannot run unless you have root access. This is because the app’s features cannot run without the root permissions because the features require the full system access before they can be useful.
  • Better battery life. Smartphones are great, but they have one caveat, which is each time you recharge the battery, it loses some of its overall lifespan. That means smartphones, in general, do not make great investments, and if your weekly paycheck is low, you will want to limit the number of smartphones you go through. One of the ways you can do that is by removing bloatware and creating a better battery life.
  • Bolster performance. If you are the budget-conscious shopper, you may want to increase the device’s performance. This can be done by removing the bloatware as well. The more processes you have running, the more memory that is used. By removing some of the apps, it can help lighten the load on your hardware.
  • Customize Android with themes. With root access, you can download and install any theme that’s at your disposal. That includes any customized theme you can find.

What Are the Risks of Rooting?

If you are buying a smartphone that is not running iOS, then it is probably the Android operating system that you want running as the ideal software to pair with your shiny new hardware. It is, in fact, the Android OS that offers you the chance to customize the OS considerably more than iOS: custom themes, run any app you know about, the works. For many users, the “openness” of an operating system is important, because it offers them more freedom which means running into fewer problems with their investments. But there is a reason iOS likes a far more locked approach: the ability to customize is not for everyone, and if you do not know what you are doing it can lead to a lot of problems which can define your time with the OS rather than freedom.

With power (full admin permissions) comes greater responsibility. Here are some of the main risk factors when it comes to rooting:

  • Malware becomes a larger threat. You might read the occasional news article about how new malware is wreaking havoc in parts of the world on Android. But the Android operating system with root access becomes considerably more vulnerable to exploits because applications are no longer prisoned off in their own sandbox environments. This means if you accidentally download malware, it can do more damage because it can spread throughout the operating system and even jump into other applications and potentially view sensitive data.
  • You can accidentally brick the smartphone. There is always a chance that you end up bricking the smartphone before you had the opportunity to use it with root access. That is because if you are going to brick it, it is going to happen during the rooting process.
  • You may void the warranty. Most manufacturers do not allow you to root the Android operating system and still get to bring it in for repairs under warranty. Whether they are legally meant to do that or not is another question, but it is now common knowledge that most do not want to help you if they find out you have unlocked the OS with root access.

Files You Need

  1. You must have a custom recovery installed on the LG G3 D855 smartphone before you can think about following this guide.
  2. You are voiding the warranty by LG when you choose to root the G3 by following this guide. You can unroot by opening your SuperSU app, or by flashing the stock ROM back on the device later. The stock ROM should also flash the stock G3 recovery which you need to wipe the custom recovery and get the warranty working again.

Rooting the LG G3 D855 running Android 6.0 Marshmallow

  1. Download the SuperSU for the G3 from the Chainfire website from this page.
  2. Connect your LG G3 handset to the computer where you have the SuperSU app waiting.
  3. Transfer the SuperSU over to the root of the G3 internal storage SD card.
  4. Learn how to boot the LG G3 in the custom recovery mode you installed earlier using the hardware keys, or by installing the Quick Boot app from the Google Play Store. You can find the instructions for both from the link.
  5. Once you have your LG G3 booted in the custom recovery mode, tap the Install option from the main recovery menu. The wording will vary depending on what version of custom recovery you have installed. However, both start with the word ‘Install’.
  6. Browse the SD card for your updated SuperSU app you shifted over to the SD card earlier.
  7. Confirm you want to install the SuperSU application from your SD card by following the on-screen instructions on how to get that done.
  8. Once flashed, go back to the main custom recovery menu on your G3 and choose the ‘reboot System’ option.
  9. The LG G3 D855 smartphone will now reboot back in normal mode and you can start using your rooted device.
  10. Open the Google Play Store application from your homescreen or app drawer and install the root checker app. Open the root checker app from your device and follow any on-screen instructions if it asks to grant Superuser access.

Since you just rooted the G3 smartphone using the SuperSU app, you obviously do not need to install the SuperSU app — you should find it on your device. The SU will keep your device safe and clean from any malware, so long as you do not grant malware access to the root file system.