[AlgebraFox]

Not OP. But I am using GrapheneOS for almost 4 months now. It is a breath of fresh air. Network Permission, Contact Scope, Duress PIN, Hardened Malloc, JIT tuning, Sandboxed Google Play etc.. are some key privacy and security features in Graphene. Will never go back to Apple's or Google's surveillance platforms.

[checkyoursudo]

I have been meaning to try it. Is it best to get a new phone, or will any old model work fine?

[switch007]

You absolutely want a somewhat modern Pixel

https://grapheneos.org/faq#device-support