Download Lineage OS 15.1 on Xiaomi Mi A2 Lite based Android 8.1 Oreo

Xiaomi Mi A2 Lite (daisy)  launched in July 2018. The smartphone came out of the box with Android 8.1 Oreo with Google's Android One Project. We have a good news now! Now you can install Lineage OS 15.1 on Xiaomi Mi A2 Lite based on Android 8.1 Oreo. In this guide, we will help you to install the latest Lineage OS 15.1 for Xiaomi Mi A2 Lite. Thanks to XDA Recognized Developer phhusson for bringing the GSI build of Lineage OS 15.1. Full Credits to him and Lineage OS team. This ROM is based on the latest Android 8.1 Oreo AOSP Phh-Treble modular ROM.

Well, GSI stands for a Generic System image. The moniker “Generic” implies that such software images could be installed on any Treble-enabled device, irrespective of the manufacturer they belong to. We already shared the complete list of devices supported for Android Pie 9.0 Generic System image (GSI). Recently, The ROM development community has completely boosted Custom ROM development with the help of Project treble.

To install Lineage OS 15.1 on Xiaomi Mi A2 Lite, your device should have Bootloader Unlocked and should be running on latest TWRP Recovery. If you have all this, then you are good to try the new Lineage OS 15.1 on your device. Follow our guide on how to upgrade, but before that. Let's understand the features of Lineage OS 15.1.

What is Lineage OS 15.1 and their feature?

Lineage OS 15.1 is the latest Stock Custom Firmware based on the official Android 8.1 Oreo AOSP source code. Along with the official Android 8.1 features, the Lineage OS 15.1 also brings tons of features and customization option which allows using your phone beyond the Stock Firmware feature. Lineage OS one of the well-known aftermarket firmware built by the team behind cyanogen. In the Android world, Lineage OS is the currently best custom ROM built with many new features. The Lineage OS 15.1 for Xiaomi Mi A2 Lite scheduled with a weekly and nightly update.

Features of Lineage OS 15.1:

• Extra Ambient display features
• Picture adjustment
• RGB color calibration settings
• Display color temperature customization
• LED Notification light settings (Customize)
• Customize Touchscreen gestures
• Performance profiles to save battery and improve the speed
• Lockscreen Customization option
• FlipFlap - smart cover support
• Privacy Guard—control app permissions
• Customize the size of the lock screen pattern
• Quick Settings Customization
• Status Bar Customization such as Double tap to sleep, Clock Settings, Show network traffic, and Status bar tuner
• SystemUI Customization
• Buttons/Navigation Bar
• Calls and Audio/Ringtone customization.
• and other miscellaneous feature.

How to Install Lineage OS 15.1 on Xiaomi Mi A2 Lite:

If you are installing custom ROM for the first time, then you must first read the difference between Custom ROM and Stock ROM. We understand you would want to make sure your installation process go as smooth as possible. So before we actually jump to the installation process of Lineage OS 15.1 ROM on Xiaomi Mi A2 Lite, let’s take a look below at how to backup all your data. When installing this 8.1.0 Oreo-based custom ROM, you're wiping all your data and system — like a brand new phone.

As a Xiaomi Mi A2 Lite user, you have many options to choose from depending on how you want to store your data. These are the some of the tips given below that we want you to keep in mind and then proceed As we said, this ROM is based on Android 8.1 Oreo. Here is the quick recap of what's on Android 8.1 Oreo.

What's on Android 8.1 Oreo?

As you’d expect, Android 8.1 Oreo is the latest update of Android Oreo. It is an incremental update that builds out some of the new features found in the first version of Oreo, but there’s plenty worth checking out. This doesn't mean Android 8.1 doesn't include the new feature because it does. Here are all the features of Android Oreo [8.0/8.1]

Features of Android Oreo:

• Notifications Channels (8.0)
• Picture In A Picture (8.0)
• Multi-Display Support (8.0)
• Keyboard Navigation (8.0)
• Background Limits (8.0)
• New Wi-Fi Features (8.0)
• Better Icons (8.0)
• Autofill (8.0)
• Emoji (8.1)
• Neural Networks API (8.1)
• Pixel Visual Core co-processing technology to third-party developers (8.1)
• and many more

Required ROM and Gapps Package:

Pre-Requisite:

• Supported device: Xiaomi Mi A2 Lite
• Note: Charge your phone up to 80% or 70%.
• USB Drivers: Download Xiaomi USB Drivers on your PC.
• Take A Full BackUP: (You can try any backup method given below)
  How to Backup Your Android Phone Without ROOT
  How to Backup Complete Stock or Custom ROM using TWRP recovery
  Backup Your Android Apps and Data with Titanium Backup
  How to Backup Your Android Phone Directly to PC with TWRP!!
  How to Backup Your Data on Android device
• Unlock Bootloader: You need to unlock the bootloader on Xiaomi Mi A2 Lite
• Custom Recovery: Install the latest TWRP recovery on Xiaomi Mi A2 Lite.
• Nandroid Backup: If you already have TWRP: then you can Create and Restore Nandroid Backup via TWRP
• Clear Cache and Dalvik Cache: Perform a Dalvik Cache wipe before proceeding from the Recovery Mode.

Step to Install on Xiaomi Mi A2 Lite:

To flash the Lineage OS 15.1 on Xiaomi Mi A2 Lite, you need the latest TWRP Recovery 3.2.1-1 or higher. If you already have, then make sure to download the above-given links.

1. First of all, make sure to download and move all the above required ROM packages on your Xiaomi Mi A2 Lite Internal storage.
2. You can now extract the GSI and vendor+boot zips [Complete Guide on How to extract any Zip file on Android devices.]
3. Now reboot your phone into TWRP Recovery and Swipe Allow Modifications (Appears for the first time only)
4. Once you are in TWRP Recovery, first of all. Take a complete backup of stock or custom ROM using TWRP.
5. Now wipe the cache, data, and system before flashing the Lineage OS 15.1 on Xiaomi Mi A2 Lite.
6. To Wipe data: Go to Wipe ---> Advanced Wipe and select Dalvik/ART cache, cache, System, Vendor, and Data and then swipe to wipe.
   Warning: Make sure not to select Internal storage
   
7. Now you can install the System image file in TWRP: Install -> Install Image -> select system.img
8. That's it! Reboot and enjoy!

I hope this guide was helpful to install the Lineage OS 15.1 on Xiaomi Mi A2 Lite based on Project Treble GSI images.

Source: XDA || Credits to phhusson