How to Install AOSP Android 9.0 Pie on Redmi Y2 (S2) [GSI Phh-Treble]

What’s on Android 9.0 Pie?

Android 9.0 Pie is the 9th iteration and a major update of Google’s Android OS. The new Android Pie brings a couple of design changes to the successor Android Oreo but the most notable one is the gesture-based navigation system. Other features of Android 9 Pie are New Quick Settings UI design, Redesigned volume slider, Advanced Battery with AI Support, Notch Support, Improved Adaptive Brightness, Manual theme selection, Android Dashboard which Google calls Digital Wellbeing, and more other features.

[su_youtube_advanced url=”https://www.youtube.com/watch?v=-HSqeuLK4G0″ controls=”alt” rel=”no”]

Features of Android 9.0 Pie:

1. Indoor navigation with Wi-Fi RTT
2. Gesture Navigation
3. Dashboard
4. App Timer
5. Wind Down
6. Notch support
7. App Actions and Slices
8. Lockdown mode
9. Zoom in text
10. Smarter Notification Channels
11. Improvement in messaging apps
12. An easier way to take screenshots and edit them
13. Auto-Rotate Button
14. Dark theme
15. Increased security
16. Default HTTPS for apps
17. Pair up to 5 Bluetooth devices
18. Alert tone to notify call recordings
19. Media Panel UI change
20. Support for HEIF image and HDR VP9 video format
21. Autofill in browsers
22. 157 new emojis
23. Ambient Display for Battery Percentage
24. Adaptive Battery
25. Adaptive Brightness
26. ART improvements

Guide to Install AOSP Android 9.0 Pie on Redmi Y2

If you are looking to install the latest version of Android OS on your device, then please follow this guide below to enjoy Android 9.0 Pie update for Xiaomi Redmi Y2.

Pre-Requisites:

• Supported on Xiaomi Redmi Y2
• Charge your phone up to 50% or more.
• Take a complete backup of your phone data [Follow any method]
  • 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
  • If you already have TWRP: then you can Create and Restore Nandroid Backup via TWRP
• Do a full data wipe in the stock recovery (this is mandatory, the twrp wipe will not work)
• Download Xiaomi USB Drivers and Install on your PC
• You need to unlock the bootloader on Redmi Y2 device. [Most Mediatek device comes with bootloader unlock]
• [su_tooltip style=”tipsy” position=”north” content=”If there is no TWRP support or you don’t want to install, then follow the second method.”]Install the latest TWRP recovery on Xiaomi Redmi Y2. [via TWRP Method] [/su_tooltip]
• Download ADB and Fastboot tool [via ADB Sideload Method]

Instructions to Flash:

To flash the AOSP Android 9.0 Pie on Redmi Y2, you can either use the TWRP Recovery method or you can flash via ADB Sideload method. If you already have, then make sure to download the above-given links.

Method 1: Install via TWRP Recovery

1. First of all, make sure to download and move all the above required ROM packages on your Xiaomi Redmi Y2 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 Android Pie 9.0 on Xiaomi Redmi Y2.
6. To Wipe data: Go to Wipe —> Advanced Wipe and select Dalvik/ART cache, cache, System, Vendor, and Data and then swipe to wipe. [su_note note_color=”#fef0ef” text_color=”#000000″]Warning: Make sure not to select Internal storage[/su_note]
   
7. Now you can install the System image file in TWRP: Install -> Install Image -> select system.img
8. That’s it! Reboot and enjoy!

Method 2: Install via ADB Sideload

—> How to Install Generic System Image on Project Treble Devices

I hope this guide was helpful to install the Android 9.0 Pie on Redmi Y2 based on Project Treble GSI images.

Source: XDA || Credits to phhusson