Install LineageOS Android 13 on OnePlus 9/9 Pro [Upd: Android 14]

Sadique Hassan•Updated Apr 6, 2024

[ Check out the latest Android 14 build as well!] In this guide, we will show you the steps to install the LineageOS 20 ROM based on Android 13 on the OnePlus 9/9 Pro. Both these devices are the last ones in the lineup that were lucky enough to get a touch of the original OxygenOS before it all went downhill. Launched with OxygenOS 11 out of the box before being updated to OxygenOS 12, you would have experienced a difference between day and light in this OS upgrade.

Fortunately, both these devices are still quite active players in custom development, thereby giving you a perfect platform to get away from the bloated ColorOS experience and welcome a clean stock OS. And there couldn’t have been a better opportunity at hand than by welcoming abode perhaps the most popular custom ROM to date. So on that note, let’s make you aware of the steps to install the LineageOS 20 ROM based on Android 13 on OnePlus 9/9 Pro.

Table of Contents

What is LineageOS ROM?

One of the oldest players in this domain, you could trace back the lineage of this ROM back to the days of CyanogenMod. Right from its inception to this date, it has stuck with its USP of providing you with just the required bit of crucial apps and services, without incorporating any additional bloatware apps. So while you wouldn’t get a plethora of features baked into the ROM, you are guaranteed a fluid and smooth usage experience.

lineageos 20 android 13

To further cement this statement, the ROM doesn’t even come with any preinstalled Google Apps, Services, and Framework [although you could easily install them later on using the GApps package]. With this, you would have got a decent idea regarding this ROM, let’s now get started with the instructions to install the LineageOS 20 ROM based on Android 13 onto your OnePlus 9/9 Pro.

How to Install LineageOS Android 13 on OnePlus 9/9 Pro

Before starting with the process, make sure to take a complete device backup beforehand. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Install Android SDK

First and foremost, you will have to install the Android SDK Platform Tools on your PC. This is the official ADB and Fastboot binary provided by Google and is the only recommended one. So download it and then extract it to any convenient location on your PC. Doing so will give you the platform-tools folder, which will be used throughout this guide.

STEP 2: Enable USB Debugging and OEM Unlocking

Next up, you will have to enable USB Debugging and OEM Unlocking on your device. The former will make your device recognizable by the PC in ADB mode. This will then allow you to boot your device to Fastboot Mode. On the other hand, OEM Unlocking is required to carry out the bootloader unlocking process.

So head over to Settings > About Phone > Tap on Build Number 7 times > Go back to Settings > System > Advanced > Developer Options > Enable USB Debugging and OEM Unlocking.

STEP 3: Unlock Bootloader

Next up, you will also have to unlock the device’s bootloader. Do keep in mind that doing so will wipe off all the data from your device and could nullify its warranty as well. So if that’s all well and good, then please refer to our detailed guide on How to Unlock Bootloader on OnePlus 9, 9 Pro and 9R

STEP 4: Download LineageOS ROM, Recovery, GApps for OnePlus 9/9 Pro

Now, get hold of the LineageOS ROM, Recovery, and associated files from below:

OnePlus 9 [lemonade]: LineageOS ROM | LineageOS Recovery | vendor_boot | dtbo | vbmeta | super_empty.img
OnePlus 9 Pro [lemonadep]: LineageOS ROM | LineageOS Recovery | vendor_boot | dtbo | vbmeta | super_empty.img
GApps: Download Link

The ROM and GApps files will be present as a ZIP whereas the recovery will be an IMG file.
Once you have downloaded all these files, transfer them to the platform-tools folder on your PC.
NOTE: The LineageOS Recovery for OnePlus 9/Pro is boot.img.

STEP 5: Boot to Fastboot Mode

Connect your device to the PC via a USB cable. Make sure USB Debugging is enabled.
Then head over to the platform-tools folder, type in CMD in the address bar, and hit Enter. This will launch the Command Prompt.
After that, type in the following command in the CMD window to boot your device to Fastboot Mode
```
adb reboot bootloader
```
To verify the Fastboot connection, type in the below command and you should get back the device ID.
```
fastboot devices
```

STEP 6: Flash vendor_boot and dtbo

First off, wipe the super partition via the super_empty.img file:
```
fastboot wipe-super super_empty.img
```
Next up, execute the below command to flash dtbo:
```
fastboot flash dtbo dtbo.img
```
Then type in the below command to flash the vendor_boot:
```
fastboot flash vendor_boot vendor_boot.img
```
After that, use the below command to flash the vbmeta:
```
fastboot flash vbmeta vbmeta.img
```

STEP 7: Flash LineageOS Recovery on OnePlus 9/9 Pro

You will now have to flash the LineageOS recovery onto your device. So execute the below command for the same:
```
fastboot flash boot boot.img
```
Once the flashing is complete, type in the below command to boot to LineageOS Recovery.
```
fastboot reboot recovery
```

STEP 8: Factory Reset Device

From the LineageOS Recovery, go to Factory Reset.
Then select Format Data/Factory Reset > Format Data.
Your device will now undergo a reset.
Once done, you shall get the “Data wipe complete” message.

STEP 9: Install LineageOS Android 13 ROM on OnePlus 9/9 Pro

From the LineageOS Recovery, go to Apply Update > Apply from ADB.
Then head over to the platform-tools folder, type in CMD in the address bar, and hit Enter.
This will launch the Command Prompt. So type in the below command to flash the ROM file via Sideload:
```
adb sideload rom.zip
```
The process will now begin and once done, you shall get the Total xfer: 1.00x message [Got an error? See FAQ below].
If you want to install GApps, then move over to the next step otherwise select Reboot System Now to boot to the OS.

STEP 9: Install GApps

Go to Advanced > Reboot to Recovery. Your device will reboot to LineageOS Recovery.
Once done, go to Apply Update > Apply from ADB.
Now type in the below command to flash the GApps file via Sideload:
```
adb sideload gapps.zip
```
You will get a Signature Verification failed message because the GApps package isn’t signed by LineageOS. That’s not an issue, just hit YES to proceed ahead.
Once done, you may now finally reboot your device to the OS via “Reboot system now”.

That’s it. These were the steps to install the LineageOS ROM based on Android 13 onto your OnePlus 9/9 Pro. If you have any queries concerning the aforementioned steps, do let us know your doubt and the device that you are using in the comments. We will get back to you with a solution at the earliest.

UPDATE: LineageOS 21 Android 14 for OnePlus 9/Pro

The latest LineageOS 21 based on Android 14 is now live for the OnePlus 9/Pro. Refer to the below guide for the download + installation steps:

How to Install LineageOS 21 Android 14 on OnePlus 9 Pro

Fix: Error During ADB Sideload

If you get one of the below error messages, then it signifies a successful installation and you can reboot the device to the OS without any issues:

Total xfer: 1.00x
adb: failed to read command: Success/No error
adb: failed to read command: No error
(~47%) adb: failed to read the command: No error
adb: failed to read command: Undefined error: 0

Tags:

Android 13Custom ROMOnePlus 9OnePlus 9 Pro