@800XL I think guides even aren’t needed) Before flashing Pixel 3a with UT, you will need to flash it to Android 9. The easiest way is doing it via Google’s web-based flasher, you don’t even need to download firmware to your PC. This flasher will download selected firmware automatically and will unlock bootloader also automatically… or at least semi-automatically, you will still need to follow some steps that is displayed on your PC’s screen (not phone’ screen!).
Check UT site for firmware code
@800XL I think guides even aren’t needed) Before flashing Pixel 3a with UT, you will need to flash it to Android 9. The easiest way is doing it via Google’s web-based flasher, you don’t even need to download firmware to your PC. This flasher will download selected firmware automatically and will unlock bootloader also automatically… or at least semi-automatically, you will still need to follow some steps that is displayed on your PC’s screen (not phone’ screen!).
Check UT site for firmware code