Now Project Zephyrus 13.1.0 Official Update for OnePlus 8T/9R is available.in this article you can download project Zephyrus custom ROM for your OnePlus 8T/9R phones. Faster and Smoother: Project-Zephyrus (ProtonKnockOFF) is smoother (ie much less junk) and responds faster than stock.
Clean UI Design: We focus on the information within the user interface.
Privacy: Project-Zephyrus(ProtonKnockOFF) facilitates keeping your data private with camera and microphone indicators, internet and sensor permissions.
Android Version : 13
Status : Stable
Devices : OnePlus 8T/9R
Build Date : 21-Oct-2022
Project Zephyrus 13.1. Official Update for OnePlus 8T/9R
* Switch to user build * Fixed call audio and mic volume * Misc improvements
By : @HELLBOY017
Download : Link