A Google Pixel 10a in Obsidian, supplied running GrapheneOS.
The Graphene Phone is a Google Pixel 10a in Obsidian with GrapheneOS installed in place of Google's own Android build. GrapheneOS is an open-source, security- and privacy-focused operating system that runs only on Pixel hardware, because Pixels are the handsets whose bootloader can be locked again after a custom system is installed; it ships without Google services by default and can run them in a sandbox if needed. The handset is Google's current mid-range Pixel.