After officially launching almost two months ago the Android 12-based LineageOS 19 is expanding to more handsets once again. This time those with the OnePlus 9 and 9 Pro alongside the Xiaomi Poco X3 Pro and budget Mi A1 can now flash LineageOS 19 on their devices (h/t XDA). For those with the latter Xiaomi handsets, this is the most recent software build that you can access and might provide a more consistent update path moving forward.
While Android 12 is already available for the OnePlus 9 series and Poco X3 Pro, the Mi A1 shipped with Android One and has only been officially updated as far as Android 9 Pie. As mentioned, this might be a way to extend the lifespan of your devices given that support for older handsets from the likes of Xiaomi and OnePlus can be sporadic or limited at best.
It’s also important to note that LineageOS 19 is actually based upon Android 12.1/12L, a build that is not yet officially available for the OnePlus 9, 9 Pro, and Poco X3 Pro. That means that if you truly want the latest and greatest version of Android on your smartphone, LineageOS 19 might provide you with that option.
Should you want to flash LineageOS 19 on your device, you can find build/device links with specific device installation instructions:
Google apps do not come pre-installed with LineageOS builds. You will, therefore, need to flash a GApps package to retain access to the Play Store and important Google apps and services. Luckily, there is a solid guide from the team behind the ROM that you can refer to here.