“A graphene device” doesn’t exist. GrapheneOS must be installed after purchasing a compatible device (Currently the Pixel line, but soon to be expanded to another manufacturer).
You can buy a phone that arrives running GrapheneOS. This might not be advisable, because it adds another point of trust in the refurbisher who actually does the flashing, but you don’t need to have the skills or do the research to install it yourself to get access to a device that runs it.
“A graphene device” doesn’t exist. GrapheneOS must be installed after purchasing a compatible device (Currently the Pixel line, but soon to be expanded to another manufacturer).
You can buy a phone that arrives running GrapheneOS. This might not be advisable, because it adds another point of trust in the refurbisher who actually does the flashing, but you don’t need to have the skills or do the research to install it yourself to get access to a device that runs it.