OnePlus 5 and 5T smartphones have started getting the October 2019 security patch based on Oxygen OS 9.0.9 official firmware. Now you can download and install this monthly security update on your device and fix the bugs. The OnePlus 5 and 5T users are waiting for the Oxygen OS 10, which is based on the Android 10 official update. But it has some time to open for these smartphones. The OnePlus is one of the best Chinese smartphones that always releases monthly updates timely to their devices. Also, OnePlus support the older devices and pushing regular updates. Recently, OnePlus pushed out the most recent October 2019 security patch via OTA.
This latest security update comes with some bug fixes, system improvements, new features, and much more. Also, the update brings fluid animations, minimal design, a variety of essential customization options, general bug fixes, and so on. The October 2019 security patch is available via OTA for limited users. If you can’t wait until the update reaches in all regions, then still you can install it manually by following our given below detailed guide.
Given below, we share the direct link of the full OTA update of Oxygen OS 9.0.9 official firmware. You can download and install on OnePlus 5 and 5T. The Oxygen OS 9.0.9 official update is not a major update but just a monthly security patch for OnePlus 5 and 5T. We strongly recommend you always keeping updated your Android phone to the latest official firmware. Now proceed to the download portion and follow the given below instructions.

Note:
This guide containing the rooted and cleaned October 2019 security patch, which is working for the OnePlus 5/5T only. Do not try to install this firmware on any other device or incorrect variant. Check the model number of your device first.
Warning:
Pre-Requirements:
- Create a proper Nandroid backup of all your existing data and settings on the phone before proceeding to the installation guide using a recommended custom recovery.
- Enable USB Debugging Mode on the OnePlus 5/5T by navigating to Settings > Developer Options.
- Verify that you’ve properly installed the OnePlus 5/5T USB Drivers on the PC.
- Your device should be rooted with the latest version of a custom recovery like CWM or TWRP installed.
- The bootloader of your OnePlus OnePlus 5/5T must be unlocked.
- Make sure that the battery level of the device is above 80% before going ahead.
Required Files:
Download OxygenOS 9.0.9 for the OnePlus 5/5T
How to Install OxygenOS 9.0.9 October 2019 Security Patch For OnePlus 5/5T Update:
Step No 1: First, setup ADB and Fastboot on your PC.
Step No 2: Download the October 2019 security patch official file on the desktop of your PC from the above-given link and rename it to ota.zip
Step No 3: Next, Enable USB Debugging on your Oneplus OnePlus 5/5T by navigating to Setting > Developer Options.
Step No 4: Connect your OnePlus OnePlus 5/5T to your PC/laptop.
Step No 5: Open the folder where you have placed the downloaded OTA.zip file and open command windows within the folder.
Step No 6: Type the following command and hit Enter to reboot your phone into Recovery Mode.
adb reboot recovery
Step No 7: Select the “Install from USB” option in Recovery Mode.
Step No 8: Type the following command and hit Enter.
adb sideloaded ota.zip
Step No 9: The installation process will be initiated, so wait for the installation process to be completed. Once the process completes, select reboot from the main Recovery Menu.
Done! These were the complete steps to install OnePlus OnePlus 5/5T October 2019 security patch update.
Let us know in the comments area below if you have any questions or trouble.
Source: XDA