How To Update Sprint LG G3 To Android 7.1.1 Nougat via Official Lineage OS Custom ROM

LG G3 is one of the best of LG’s budget smartphone. If you want to update your LG G3 to Android 7.1.1 Nougat then you are at right place. The Lineage team has officially announced the Lineage OS custom ROM based on Android 7.1.1 Nougat for Sprint LG G3 (LS990). Now LG G3 users can test the latest Android Nougat experience on their LG G3 devices. The latest update packed with the latest Android features, customization’s, apps, optimizations and much more. Also, Lineage OS custom firmware is very stable, smooth and runs fast on G3. This ROM is not officially announced by LG or Google but just a custom ROM which is developed by third-party developers. Installing an official Lineage OS Android 7.1.1 Nougat custom ROM required a custom recovery like TWRP or CWM (Clockwork Mod) already installed on it and the bootloader to be unlocked on the LG G3 phone.

By following this step by step guide, you can update your Sprint LG G3 (LS990) to official Lineage OS Android 7.1.1 Nougat custom ROM. Once your device is updated, then your phone should run better and faster while the battery life will be upgraded. Many users have tested it and they have not found any software related problems and reported that everything is working without issues. Before Proceeding, keep in mind to take a full backup of all your valuable data. If you are interested in installing official Lineage OS Android 7.1.1 Nougat custom ROM on Sprint LG G3 (LS990) then go ahead and follow the given steps.


LG G3 To Android 7.1.1 Nougat
LG G3 To Android 7.1.1 Nougat


This guide containing the Android 7.1.1 Nougat official Lineage OS ROM and instructions are working with LG G3 (Model LS990) only. Do not try to install this beta firmware on any other device or incorrect variant. Check the model number of your device first.


AndroidSoul will not be responsible for any damage occurred to your LG G3 LS990 during or after the installation of Lineage OS official custom build. Proceed at your risk.

Before Getting Started:

  • Create a proper backup of all your important data and settings before proceeding to the installation guide using a recommended custom recovery like TWRP or CWM.
  • Download and install LG G3  USB Drivers on the PC.
  • Enable USB Debugging on the LG G3 on the PC by navigating to Settings > Developer Options >check USB Debugging option.
  • The LG G3 should be rooted with the latest version of custom recovery installed.
  • The bootloader of your G3 should be unlocked.
  • Check the battery level of your device; it should be charged at least about 80% to prevent unexpected shutdowns while installing the Lineage OS beta firmware.

Required Files:

How to Install Android 7.1.1 Nougat on Sprint LG G3 LS990 via Official Lineage OS ROM:

Step No 1: – First, download the Android 7.1.1 Nougat Lineage OS official build and Google Apps on the desktop of your PC.

Step No 2: – Connect your LG G3 to the PC via its USB data cable.

Step No 3: – Transfer the downloaded firmware and Gapps .zip files to the root folder of the SD card of your phone.

Step No 4: – Disconnect the G3 from the PC and turn it OFF to boot into Recovery Mode.

Step No 5: – Turn ON the LG G3 while pressing and holding Volume Down + Power keys at the same time for a while until the LG logo appears, then release the buttons then press them again. Again press Power key three times to boot into recovery mode.

Step No 6: – While your device is now in TWRP recovery, create a Nandroid backup.

  • Select Backup
  • Do a swipe on the Swipe to Back Up option.

Step No 7: – Next, perform a full wipe including Dalvik Cache, Cache, System and Factory Data Reset.

Step No 8: – Once done, go back to the main menu of Recovery and select Install.

Step No 9: – Navigate to the official Lineage OS ROM .zip file that you’ve already transferred to the root folder of the SD card. Select it and swipe the Swipe to Confirm Flash option to begin the installation process.

Step No 10: – Go back to the main recovery menu and select Reboot > System after the installation is completed.

Step No 11: – Now, install Google Apps on your LG G3 by repeating the above steps.

Step No 12: – Reboot the LG G3.

LG G3 may take about 4 to 5 minutes while booting up for the first time after installation. So please be patient.

That’s All! You’ve successfully installed Android 7.1.1 Nougat Lineage OS official custom ROM on your Sprint LG G3.

1 Comment
  1. A H says

    How to update bootloader?

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