A detailed guide has been provided for users to flash the latest ROM along with steps to unlock the bootloader, install TWRP and achieve root access on the OnePlus forums. The steps vary for users with and without root access as the process is much simpler for users without root access. The latest update is a 1.2 GB sized file and will enable you to upgrade without any data loss. The post includes links to all other full ROMs and incremental updates. You can find the full Oxygen OS 3.2.1 ROM hereprovided on the OnePlus forums. Root access enables the user to have greater control over the operating system of the phone including tweaking the functioning.You can find the full Oxygen OS 3.2.1 ROM Flashing the signed ROM is only essential for people with root access to the phone. I grabbed the signed ROM and flashed it through the unofficial custom recovery TWRP and experienced a significant bump in battery life despite very heavy usage. The rollback did not stop people from downloading the full ROM or the incremental update and flash it. Oxygen 3.2.0 addressed most of the issues including improved RAM management, GPS performance, the introduction of sRGB display profile. These problems ranged from not using the entire 6GB RAM to the inaccuracy of the display as noted by Anandtech in their review. The last update, Oxygen OS 3.2.0 was made in response to the issues pointed out by reviews and users on the internet. OnePlus has started the roll out for Oxygen OS 3.2.1 after fixing the issues with the last update.