Submitted by Admin on September 2, 2021, 8:09 am PDT 110
Specifications and info
Qualcomm SM8250 Snapdragon 865 5G (7 nm+)
Octa-core: 1 x 2.84 GHz | 3 x 2.42 GHz | 4 x 1.8 GHz - Kryo 585
OnePlus doesn't always provide download links for all of their OxygenOS firmwares.
1. First, download the OxygenOS full firmware file you want to install.
6. Tap the firmware file and select 'Install now' when prompted. In-built updater will now install firmware on your OnePlus 8T.
7. Once the installation finishes press 'REBOOT' button shown on the phone’s screen.
P.S. Downgrade is all the same, but it's going to wipe your data.