nostr:nprofile1qqsrkl7gyds37xh2af37uwlknvjm32ska3hgr5d0cwgzdqy0ux2r2ncpzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsz9mhwden5te0wfjkccte9eenx7pwwdhkx6tpdshsh2l07j is very knowledgeable about phone privacy & security as well. He has detailed a lot about GrapheneOS here on Nostr.