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14th December 2016, 01:19 PM |#3  
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Installation Methods ;)
Before we start:-

This method is only for the OnePlus 3T.

Follow the steps correctly otherwise you may brick your device. I am not responsible for any damage to your device, please ensure that your device is at least 60% charged to prevent the accidental shutdown in-between the update process.


Download the necessary files from the post above and follow as below

PS: Dirty flash is fine if you are running a previous OOS version or any rom based on OOS, else if you come from a custom rom Clean Flash is recommended.

********************* For Stock Non Rooted Users with Stock Recovery *****************

1. Download the appropriate OTA from above link and place it in the root folder.

2. Navigate to Settings > System Updates > Settings Icon > Local Upgrade & Select the OTA File

3. Once selected system would prompt upgrade now

4. Select upgrade now and system would reboot in stock recovery and flash the OTA

5. The installer would itself flash the OTA and reboot the device.

The Device will reboot and your OnePlus 3T is now running on the latest OxygenOS 5.0 firmware & OS based on 8.0 Oreo.

PS: The first boot may take some time so keep calm and wait for it to boot.
* After flash is successful go back to recovery and a wipe of cache is recommended.
* If in any case flash is unsuccessful the system would prompt you to download the full 1.4GB zip.
* Download that and follow the same process as above.

************************ For Rooted Users with TWRP Recovery ************************

Download the required files from Post 2

Once you have downloaded all the required files on you device, please follow as below

1. Update TWRP to the ones provided above by flashing the downloaded image

2. Reboot Recovery and Take a Nandroid of your existing ROM
(Note: Nandroid from 3.0.4-1 cant be restored on older version or and visa-versa)

3. Wipe > Advance Wipe > Select Dalvik & Cache > Swipe to Wipe

4. Install Menu > Select OOS 5.0 Full Rom Zip > Swipe to Flash

5. Flash the provided SuperSU/Magisk to maintain root (Optional)

6. Wipe Dalvik & Cache

7. Reboot System and Enjoy OxygenOS 5.0 Firmware & Latest OOS based on 8.0 Oreo

The first boot may take some time as the system would boot twice due to flash of supersu so keep calm

PS: Do not flash partial update OTAs (under 1 GB) on a modified device! If you want to use partial OTAs, you must first flash a full OTA that it applies to, and then flash the partial OTA from stock recovery. Flashing partial OTAs from TWRP will either fail or soft brick your device. You can return to a usable state by flashing one of the above full OTA zips in recovery.
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