Shockingly, the Google-produced operating system that GrapheneOS is based on is easiest to build targeting Google-produced devices. Google is also as far as I'

Shockingly, the Google-produced operating system that GrapheneOS is based on is easiest to build targeting Google-produced devices. Google is also as far as I'm aware one of only two mainstream vendors, and the only one making flagship-tier devices, that reliably offers bootloader unlocking as a feature so you can install alternative operating systems without having to first crack the device.