Time to ditch OxygenOS for LineageOS
All five phones are still supported by their manufacturer and have received their official Android 12 update. However, the official OxygenOS 12 update for the OnePlus 8, 8 Pro, and 8T is marred with bugs and issues. So, if you are frustrated with the stock ROM, consider switching to LineageOS 19. It will offer a near-stock Android-like experience with some additional enhancements thrown in to improve usability. Similarly, if you are not happy with One UI 4.1’s performance on your Galaxy phone, LineageOS can help solve that.
If you consider flashing the ROM on your OnePlus 8, install the official Android 12 update first. Then, confirm that all vendor firmware files are up-to-date before proceeding with the installation steps. For starters, you will have to unlock your phone’s bootloader. Also, create a backup of your important data, as the device would be completely erased when you flash the ROM.
You can find the detailed instructions and download links on LineageOS Wiki (via XDA Developers):
- OnePlus 8 – Wiki
- OnePlus 8T – Wiki
- OnePlus 8 Pro – Wiki
- Samsung Galaxy A42 4G – Wiki
- Samsung Galaxy A72 – Wiki
Don’t forget to flash a suitable GAPPS package after installing the ROM on your phone. Or, if you prefer to live a Google-free life, you can skip flashing the package altogether.