This ROM is based on OxygenOS ROM. theOne3TOS 8.0.0 Oreo has all of the features form the official Android 8.0.0 Oreo. It is open beta for OnePlus 3T. And with that, you will be able to update OnePlus 3T to 8.0.0 theOne3TOS Oreo using this complete tutorial. Not necessary, but it would be better if your phone is rooted and has a custom recovery installed. A custom recovery will be needed to install 8.0.0 based theOne3TOS ROM zip file, since this is not an official OnePlus firmware update.
If this is your very first time installing a custom ROM, we understand you would want to make sure your installation process go as smooth as possible. So before we actually jump to the installation process of theOne3TOS ROM, let’s take a look below at how to backup all your data. When installing this 8.0.0 Oreo based custom ROM, your entire data will be wiped clean — like a brand new phone.
Disclaimer: All the custom ROMs and firmwares, official software updates, tools, mods or anything mentioned in the tutorial belong to their respective owners/developers. We (TeamAndroid.com) or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 😉
8.0.0 theOne3TOS Oreo ROM Details:
This amazing theOne3TOS custom ROM comes with tons of new features and is based on 8.0.0 Oreo. A quick list of the main features in theOne3TOS is given below and we are sure you’d love to use this on your OnePlus 3T:
There are tons of useful articles and how-to guides on Team Android for the OnePlus 3T, but we think you might be interested in the following posts:
- Install OxygenOS: How to Install OxygenOS 4.1.0 on OnePlus 3T – Android 8.0.0 Firmware.
- Root OnePlus 3T: How to Root OnePlus 3T on Official Firmware with SuperSU.
- OnePlus 3T TWRP: How to Install TWRP Recovery on OnePlus 3T – Complete Guide.
- Unlock Bootloader: How to Unlock Bootloader of OnePlus 3T Android Phone.
- Custom ROMs: For a complete collection of OnePlus 3T custom ROMs, click here!
Like this theOne3TOS ROM based on the latest 8.0.0? We love it too and we know you are looking forward to install it on your phone now.
OnePlus 3T USB Drivers
You will need to connect your Android phone with the computer. For that, please make sure you have installed the USB drivers for OnePlus 3T properly. If not, you can download the latest official drivers from our Android USB Drivers section here:
All set and ready? Good. Now, let’s proceed with the tutorial below and update OnePlus 3T to 8.0.0 theOne3TOS Oreo custom firmware.
NOTE: There is a helpful tips section at the bottom of this guide to help you backup your entire phone as all your data will be wiped clean during the installation of this ROM. We want to make sure your installation goes smooth and you do not end up with any problems.
TUTORIAL: How to Install 8.0.0 theOne3TOS Oreo on OnePlus 3T
We have put together a detailed step-by-step instructions guide on how to install 8.0.0 theOne3TOS Oreo custom firmware on OnePlus 3T. If you are used to installing custom ROMs on your One, then this should not be any different for you.
As we mentioned earlier, you need to have a custom recovery installed on your phone. Please do that first and then get back to this tutorial. And before you proceed below, make sure you read the tutorial once before actually performing it on your Android device.
- This tutorial is only for installing 8.0.0 theOne3TOS ROM on OnePlus 3T. Please do not try on any other variants.
- Your phone should have a custom recovery installed in order to install this theOne3TOS ROM on your phone.
- We will be using TWRP Recovery for this tutorial. Tutorial: How to Install TWRP Recovery on OnePlus 3T – Complete Guide.
- This tutorial will wipe out all your data. Make sure you backup all your data in your phone before proceeding.
- Perform a Dalvik Cache wipe before proceeding from the Recovery Mode.
Complete Step-By-Step Instructions:
Step 1 – Download 8.0.0 theOne3TOS ROM for OnePlus 3T to your computer.
Step 2 – Connect and mount your OnePlus 3T USB memory to your computer using the USB cable.
Step 3 – Now copy/paste the downloaded 8.0.0 ROM zip file to your phone memory / SD card. Make sure the file is in the phone memory / SD card root (not in any folder).
Step 4 – Then turn OFF your phone and disconnect from the USB cable.
Step 5 – Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Down + Power buttons together. Alternatively, read this: How to Enter Recovery Mode on OnePlus 3T.
NOTE: Screenshots of the Team Win Recovery Project (TWRP Recovery) may change as new versions are released.