They don't refuse other manufacturers, it's quite the opposite -- GrapheneOS provides list of requirements for future device support. AFAIK Fairphone and Nothin

They don't refuse other manufacturers, it's quite the opposite -- GrapheneOS provides list of requirements for future device support. AFAIK Fairphone and Nothing don't fit more than a few requirements from this list. https://grapheneos.org/faq#future-devices https://grapheneos.org/faq#future-devices