OnePlus 6 and 6T are the successor to the OnePlus 5 series and do offer more improvement in the build quality and specifications.
Flashing a custom ROM in your OnePlus 6 and 6T can enhance the performance of your phone, and bring the most out of your phone.
If you are looking for the best custom ROMs for the OnePlus 6 and 6T in 2021, then you are in a right place.
This article will discuss the best custom ROMs for the OnePlus 6 And 6T in 2021.
Table of Contents
Best Custom ROMs For OnePlus 6 And 6T in 2021

Lineage OS

Been a fan of CyanogenMod? Well, then you must try Lineage OS on your OnePlus 6 and 6T which is the legacy of the Cyanogen MOD. Cyanogen MOD was quite a famous ROM back in the day. The release of Lineage OS fixed all the issues that Cyanogen MOD has, and carried the legacy of the ROM.
Talking about the performance of the phone, it is quite customizable, and also brings faster and snappy performance to your phone. It has various features, including a customizable status bar, Quick Toggle feature, and various others.
ROM OS: Android 10
Download Link: Lineage OS
ROM Maintainer: LuK1137
Official Thread: Link
Paranoid Android Quartz

Paranoid Android Quartz is one of the best ROMs that one can use on their device. The ROM works to provide better battery life, more functionality, and performance.
Paranoid Android Quartz provides various features like pulse light, raise to wake functionality, security patches, and various other features. The community work on introducing more features to the ROM.
ROM OS: Android 10
Download Link: Paranoid Android Quartz
ROM Maintainer: xboxfanj
Official Thread: Link
Pixel Experience ROM

The next best ROM on the list is Pixel Experience ROM, which as the name suggests delivers Pixel experience to your OnePlus 6 and OnePlus 6T. The ROM is more inclined towards providing a smooth experience to the device you are using.
For people fans of stock Android, then this is the theme for you. The ROM provides similar features to that of a Pixel device, thus keeping up with the pure stock Android experience.
ROM OS: Android 10
Download Link: Pixel Experience ROM
ROM Maintainer: rdjr5
Official Thread: Link
Arrow OS

Arrow OS is a simple ROM without too many features. The ROM only has features that are essential to the users, the features that are used in day-to-day life.
With Arrow OS, you can expect better performance because it focuses on RAM and battery management. The ROM has now been updated to Android 11, and it has all the essential features that Android 11 has to offer.
ROM OS: Android 11
Download Link: Arrow OS
ROM Maintainer: raj_jdja
Official Thread: Link
Android Ice Cold Project (AICP)

Last on the list is AICP ROM, which is a simple ROM that you can flash into your device. AICP was developed by Developers on HTX Desire HD while keeping the aim to keep the ROM clean, simple, and neat.
The ROM does comes with fewer bugs and provides blazing performance. Users using this ROM does not report a frequent bug, however, if you encounter any bug, you can report it to the developer to get it fixed with the next update.
ROM OS: Android 10
Download Link: AICP ROM
ROM Maintainer: csolanol
Official Thread: Link
Final Words
We have come to the conclusion of this article about the best custom ROMs for the OnePlus 6 and 6T in 2021. That’s it with the article, hope you love reading our blog posts. Do let us know in the comment section, which ROM you will be flashing on your device.