
While OnePlus has already released Android Pie update for all OnePlus 6T devices, but I know many of here still like using the custom ROM on your phone, aside from the stock OxygenOS firmware. Unlike other OEM manufacturers, OnePlus encourages its users to install custom ROMs on the phone. If you are eager with custom ROMs on your OnePlus 6T, there are the best Android 9.0 custom ROMs for your OnePlus 6T.
These are third-party ROMs, so to flash them, your phone needs to be unlocked bootloader first and TWRP 3-2-3 recovery is already installed on your OnePlus 6T.
Once you are all set, let’s start choosing the best Android Pie ROM for your phone.
1 Pixel Experience ROM

This is the first Android 9.0 custom ROM for OnePlus 6T users. The initial builds still persisted bugs, but now, many of them were already fixed and there were more features added in. If you want to install a custom ROM for your OnePlus 6T, then this is a great ROM you should try on.
ROM Info:
Android OS version: 9.0.0
Security patch level: April 2019
Kernel Source: illusion Kernel
Build author: saksham_033
What’s working:
Wi-Fi
RIL
Mobile data, GPS
Camera
Camcorder
Bluetooth
FM Radio
NFC
Sound/vibration
Alert slider
Device Gestures
Facelock
Fingerprint
Download the ROM from the link: Pixel Experience ROM