How to Install AOSP Android 9.0 Pie on Oukitel U23 [GSI Phh-Treble]

Here we will guide you on how to download and install AOSP Android 9.0 Pie on Oukitel U23. This ROM is based on Android 9.0 Pie GSI with Treble Enabled. 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).

Now we have good news for Oukitel U23 users. You can now download and install the AOSP Android Pie 9.0 GSI on Oukitel U23. Full Credits to the XDA Recognized Developer phhusson who is the great man behind the work of Project Treble GSI build. Recently, The ROM development community has completely boosted Custom ROM development with the help of Project treble. We’ve seen the Lineage OS, Resurrection Remix, Mokee OS, Pixel Experience has made their way to support most of the budget device based on Kirin, Exynos, Lineage, and other obscure brands.

To install AOSP Android 9.0 Pie on Oukitel U23, your device should have Bootloader Unlocked and should be running on latest TWRP Recovery or you can flash via ADB sideload method. If you have all this, then you are good to try the new Android 9.0 Pie on your device. Follow our guide on how to upgrade, but before that. Let’s understand the features of Android 9.0 Pie.

Contents

• 1 Oukitel U23 specifications:
• 2 What’s on Android 9.0 Pie?
  • 2.1 Features of Android 9.0 Pie:
• 3 Guide to Install AOSP Android 9.0 Pie on Oukitel U23
  • 3.1 Pre-Requisites:
  • 3.2 Required ROM and Gapps Package:
• 4 Instructions to Flash:
  • 4.1 Method 1: Install via TWRP Recovery
  • 4.2 Method 2: Install via ADB Sideload

Oukitel U23 specifications:

Talking about the specifications, Oukitel U23 features a 6.3-inch IPS display with a screen resolution of 1080 x 2340 Pixels. It is powered by MediaTek Helio P60 MT6771, 64-Bit Processor coupled with 6GB of RAM. The phone packs 64GB internal memory with expandable storage support of 256GB via microSD card. The camera on the Oukitel U23 comes with a Dual 48MP + 8MP rear camera with dual-LED dual-tone flash and 16MP front camera for selfies. It is backed by a Non-Removable 5150 mAh Lithium-Polymer Battery. Oukitel U23 also has a fingerprint sensor on the back.

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.

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 Oukitel U23

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 Oukitel U23.

ROM is still under experiments. GetDroidTips will not be responsible for any internal/external damages to the device that may happen while/after following this guide. This ROM may or may not be completely stable and we don’t recommend you to try this ROM as a daily driver. So far this ROM worked smoothly on many devices.

Pre-Requisites:

• Supported on Oukitel U23
• 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 Oukitel USB Drivers and Install on your PC
• You need to unlock the bootloader on Mediatek device. [Most Mediatek device comes with bootloader unlock]
• Download ADB and Fastboot tool [via ADB Sideload Method]

Required ROM and Gapps Package:

• Download and Flash Latest TWRP Recovery 3.2.1-1 or higher
• Download GSI Treble Firmware Files Here: Download – Download ARM64
• Download Android 9.0 Pie Gapps Package or you can download OpenGapps 9.0.

arm = 32 bit arm processor
arm64 = 64 bit arm processor
aonly = a partition scheme
ab = ab partition scheme
vanilla = there is no Gapps installed
Gapps = Gapps are installed
floss = an open source alternative to Gapps
SU = superuser (root)
noSU = no superuser (no root)

You need only the GAPPS version to download and install AOSP Android Pie. Vanilla is basically plain w/o GAPPS, and FLOSS is with Open Source alternatives to the GAPPS.

If you face bootloop then flash the Vanilla version and then you can install the OpenGapps or any other alternative Gapps.

Instructions to Flash:

To flash the AOSP Android 9.0 Pie on Oukitel U23, 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

No TWRP Recovery support yet. Skip this and follow the second method to install Android Pie.

1. First of all, make sure to download and move all the above required ROM packages on your Oukitel U23 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 Oukitel U23.
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!

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 Oukitel U23 based on Project Treble GSI images.

If this method doesn’t work, then go to the AOSP 9.0 Phh-Treble thread in XDA and report your issue.

Source: XDA || Credits to phhusson