Install LineageOS 19 [Android 12] on OnePlus 7/7 Pro/7T/7T Pro

In this guide, we will show you the steps to install LineageOS 19 onto the OnePlus 7/Pro/7T/7T Pro. There has been a notion that the seventh iteration of OnePlus devices was the last in this lineup that truly had the USP of this OEM’s flagship killer stature. Although it might sound a tad harsh, but many of you might be in sync with this statement. Not only were these devices the absolute best in this domain, but they also had a plethora of goodies for tech enthusiasts as well.

So much so that even to this date, its custom development is going pretty strong. To further concrete this statement, one shouldn’t look any further than the fact that one of the most popular custom ROMs has just made its way over to these devices. And in this guide, we will show you how to get hold of it right away. So without further ado, let’s get started with the instructions to install LineageOS 19 onto the OnePlus 7/Pro/7T/7T Pro. Follow along.

Install LineageOS 19 [Android 12] on OnePlus 7/7 Pro/7T/7T Pro

The below instructions will wipe off all the data, so 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: Download LineageOS 19 ROM

Next up, get hold of the ROM for your device from below. Along with that, make sure to download its associated recovery file as well. Moreover, if you want Google apps and services, then download the GApps as well. All these links have been given below, grab them right away:

OnePlus 7: ROM + RECOVERY
OnePlus 7 Pro: ROM + RECOVERY
OnePlus 7T: ROM + RECOVERY
OnePlus 7T Pro: ROM + RECOVERY
..............................
GApps: Download Link

Once you have downloaded all three files [ROM, recovery, and GApp], transfer them to the platform-tools folder on your PC. Likewise, rename the LineageOS 19 ROM to rom.zip, the LineageOS recovery file to recovery.img, and the GApps package to gapps.zip.

STEP 3: 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 4: Unlock Bootloader on OnePlus 7 Series

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 the Bootloader of OnePlus 7 series.

STEP 5: Boot to Fastboot Mode

1. Connect your device to the PC via a USB cable. Make sure USB Debugging is enabled.
2. Then head over to the platform-tools folder, type in CMD in the address bar, and hit Enter. This will launch the Command Prompt.
3. After that, type in the following command in the CMD window to boot your device to Fastboot Mode

   adb reboot bootloader

   

4. To verify the Fastboot connection, type in the below command and you should get back the device ID.

   fastboot devices

   

STEP 7: Install LineageOS Recovery on OnePlus 7/Pro/7T/7T Pro

1. Execute the below command depending on your device to flash the LineageOS Recovery

   OnPlus 7/7 Pro: fastboot flash boot recovery.img
   OnPlus 7T/7T Pro: fastboot flash recovery recovery.img

   

2. Now use the Volume keys to bring up the Recovery option and hit the Power key to confirm it.
3. Your device will now boot to the LineageOS Recovery.

STEP 8: Install LineageOS 19 on OnePlus 7/Pro/7T/7T Pro

1. To begin with, go to Factory Reset > Format Data/Factory Reset > Format Data.
2. Your device will now undergo a reset. Once done, you will get the Data Wipe complete message.
3. Now go to the recovery’s home page and select Apply Update > Apply from ADB.
4. After that, execute the below command that is opened inside the platform-tools folder.

   adb sideload rom.zip

   

5. The ROM will now be flashed. Once done, you will get the Total xfer: 1.00x message.

NOTE: In some cases, the process will stop at 47% and report adb: failed to read command: Success. Likewise, it could also report adb: failed to read command: No error or adb: failed to read command: Undefined error: 0. All these messages signify that the flashing has been successfully completed.

STEP 9: Install GApps on OnePlus 7/Pro/7T/7T Pro

If you want to Google apps and services, then you will have to flash GApps right now, you cannot do so at a later stage. So refer to the below instructions to flash it.

1. From the LineageOS recovery, go to Advanced > Reboot to Recovery.
2. Once your device reboots to recovery, go to Apply Update > Apply from ADB.
3. After that, execute the below command to flash the GApps package

   adb sideload gapps.zip

   

4. You might get a signature verification failed message, reply YES [any file that hasn’t been signed by Lineage will throw this error, it is completely normal].
5. Once the flashing is complete, go to the recovery home page and select Reboot System Now. Your device will now boot to the newly installed OS.

That’s it. These were the steps to install the latest LineageOS 19 based on Android 12 onto your OnePlus 7/Pro/7T/7T Pro. If you have any queries concerning the aforementioned steps, do let us know in the comments. We will get back to you with a solution at the earliest.

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About Chief Editor

Sadique Hassan

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A technical geek by birth, he always has a keen interest in the Android platform right since the birth of the HTC Dream. The open-source environment always seems to intrigue him with the plethora of options available at his fingertips. “MBA by profession, blogger by choice!”

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