Lineage OS is based on CyanogenMod running Android Nougat ROM, flashing this ROM should be the same as CM14.1 ROM. Head over here to check out the progress of official builds and so forth, if you’re not okay with installing unofficial builds.
•This tutorial is only for installing Unofficial Lineage OS 14.1 ROM on Samsung Galaxy Note 3 LTE SM-N9005. Please do not try on any other Samsung Galaxy Note 3 Variants.
•Samsung KIES will NOT detect your phone after installing this ROM because it is a custom firmware
•Your phone should be Rooted & have a Custom Recovery installed in order to install this CM14 ROM on your phone.
•We will be using TWRP Recovery for this tutorial.
•This tutorial will wipe out all your data. Make sure you backup all your data in your phone before proceeding.
•Perform a Dalvik Cache wipe before proceeding from the Recovery Mode.
•Battery Must be Charged above 92% before using this Tutorial.
How to Install Unofficial Lineage OS 14.1 ROM on Samsung Galaxy Note 3 LTE SM-N9005
Step 1 – Download Unofficial Lineage OS 14.1 ROM for your Samsung Galaxy Note 3 and Nougat 7.1 Gapps to your computer.
Step 2 – Connect and mount your Samsung Galaxy Note 3 (USB memory on your computer using the USB cable.
Step 3 – Now copy/paste the downloaded Unofficial Lineage OS 14.1 ROM zip file to your SD card. Make sure the file is in the SD card root (not in any folder).
Step 4 – Then turn OFF your phone and disconnect from the USB cable.
Step 5 – Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Up + Home + Power buttons together.
Step 6 – Once you are in ClockworkMod Recovery, select perform a full data wipe by selecting “wipe data/factory reset”. Use the Power button to select everything while in the Recovery Mode.
Step 7 – Then, perform a cache wipe by selecting “wipe cache partition”.
Step 8 – Now this is optional, but it is recommended to perform a wipe of your dalvik cache as well. You will not get into boot loops or any other errors. From CWM recovery, go to ‘advanced’ and then select “wipe dalvik cache”.
Step 9 – Then go back to the main Recovery screen and select “install zip from SD card”.
Step 10 – Now select “choose zip from sdcard”. Using your volume keys, navigate to the Unofficial Lineage OS 14.1 ROM zip file that you copied to your SD card and select it using the Power button. Confirm the installation on the next screen and the installation procedure should start now.
* Nougat 7.1 Gapps: Repeat the above step for the Gapps zip file as well and install it on your tablet.
Step 11 – After the installation completes, go to “+++++Go Back+++++” and reboot the phone by selecting “reboot system now” from the recovery menu .
Your Samsung Galaxy Note 3 LTE SM-N9005 will boot now and it might take about 5 minutes to boot on your first time. So, please wait.
That’s it! Your Samsung Galaxy Note 3 LTE SM-N9005 should now have Unofficial Lineage OS 14.1 ROM installed on your phone! Go to Settings > About phone to verify.