Download and Install Lineage OS 15.1 For HTC One M9 (Android 8.1 Oreo)

Download and Install Lineage OS 15.1 On HTC One M9 (Android 8.1 Oreo): Lineage OS as you all know is one of the most popular custom ROM families for Android devices. It started out as CyanogenMod and now it is called Lineage OS. The most recent update for Lineage OS (i.e. Lineage OS 15.1) has finally come out on the market. This latest unofficial build comes to us thanks to Flyhalf205, Recognized Contributor over Xda for sharing with us this build which works well for HTC One M9 users. Today, in this post, we will be sharing with you how to install the latest update of Lineage OS on HTC One M9. This new update will be based on Android 8.1 Oreo OS and will come with all the latest features of that OS. Before running off to the installation part, we must make it clear that this is not the official build of Lineage OS 15.1 which is why it is still in the Beta stage. There are some bugs and fixes which need to be taken care of before this custom ROM runs smoothly. So, if the users can wait for few more days, then they should, as the new update for this build is scheduled to be released soon. That update will come with a lot of bug fixes and optimizations.

HTC has been an incredibly classy brand for a lot of time. Time and time it has managed to release some extraordinary models which have driven its fanbase crazy. Its One M9 comes with a 5.0-inch display screen with full HD resolution of 1920x1080p, a Qualcomm MSM8994 Snapdragon 810 Octa Core processor, Adreno 430 GPU, 3 GB RAM, 32 GB internal storage capacity, and a non-removable Li-Po 2840mAh battery. It runs on Android 5.0 Lollipop while it has an Android 7.0 Nougat update waiting. Its other features include Wi-Fi, Bluetooth v4.1, NFC, a 20.0 MP rear camera, a 4.0 MP front camera, GPS, Quick Charge 2.0, and more.

In this post, you will get the perfect guide for installing Lineage OS 15.1. This guide will provide you with a step-by-step passage using which you can install this custom ROM. But first, you will need to get some basic information regarding Lineage OS which can be availed by continuing with this post.

New Android 8.1 Oreo Related Updated Posts

Lineage OS 15.1 Features | Android 8.1 Oreo Features

As Lineage OS 15.1 is based On Android 8.1 Oreo’s Source code, it has all the latest Android Oreo features and in addition to that Lineage OS also has some extra customization features.

#1 AutoFill

Android 8.1 Oreo now comes with Autofill feature which was available in the Chrome browser until now. The feature, Auto Fill mode which means that the OS will save your Email Address as well as Password. This will save your precious time.

#2 Adaptive Icons

Now Android also added Adaptive Icons which means that the smartphone will now have an option to modify the default icons for various applications in many shapes such as squircle, square, rounded and others. This is done to ensure that the icons on different apps are in line with the other apps for uniformity purpose. This will make your phone looks cool and minimalistic

You may Like: How to get Android 8.1 Oreo Adaptive Icons feature on Android 5.0 and above

#3 Updated Emoji

In Android 8.1 Oreo, Google has once again updated the default emojis present in the Android OS to a blob-less emoji version rather than blob version which was seen on Android 7.0.There many new emojis are added to enhance your messaging experience

#4 Notification Dots

This feature is same as the one present on Android 7.0 Nougat where users can long press on home screen to see the options but this feature is now extended to show notifications of that particular app by long pressing the icon.

#5 Picture -In- Picture Mode

The picture in Picture mode which is also known as PiP mode is also added to Android 8.1 Oreo. This will be shown in floating window rather than the split-screen.

#6 Google Play Protect and 2X Boot Time

This “Google Play Protect” is added in the Google Play Store and it will be a background service that will check for apps and its usage and data storage permissions and notify users if it is safe to install and use the app.

Thanks to the great optimization in Android 8.1 Oreo, the boot will now take 10 seconds to do so which is a significant improvement. (Previously 15-20 Sec.)

Above are some of the main features Android 8.1 Oreo (Lineage OS 15.1.0) comes with. But there are much more. Overall Lineage OS is the best Custom ROM available for Android.


  • Make sure the bootloader on your device is unlocked and your device is rooted and you have a custom recovery installed.
  • Make sure your device has more than 50% battery.
  • Make sure you have taken a backup of your important data.Now proceed To Install Lineage OS 15.1 On HTC One M9.

Disclaimer is not responsible for any damage happened to your device(s) while following this guide, proceed at your own risk.

Download Lineage OS 15.1 For HTC One M9

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  • Make sure your device is rooted and have the latest TWRP recovery installed. (Check the Pre-Requirement Section Above)
  • First, download the files from the above link.
  • Now transfer the downloaded files to the internal storage of your device.
  • Now reboot to the TWRP recovery by holding your Armor and volume down buttons together for a few seconds.
  • Take a backup by selecting the option from the home screen and then your data and cache from the recovery menu.
  • Now select install and then browse for the downloaded ROM file and then select it.Next flash the Gapps file and then Magisk (optional).
  • Once the flashing process is completed, reboot your phone and you will be booted into Android Oreo 8.0.

If you have any doubts regarding this article, feel free to comment below.

Source: Xda is one of the leading tech blogs started in 2014. Our stories have been picked up by the likes of Forbes, Foxnews, Gizmodo, TechCrunch, Engadget, The Verge, GSMAreana, and many others. Want to know more about us? Head here. You can follow us on Telegram, Twitter, Instagram and Facebook

An NIT Rourkela Graduate in CS, Blogger, Android Geek, and a Tennis Fanatic. I have been writing about Android OS for Last 8 years.

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