Im considering buying a new phone and i don’t really consider a Pixel. I really like Fairphones approach, with the self repairable stuff. Even though they don‘t have a headphone jack. But well… I can’t change it. I’ll definitely go with the adapter over wireless headphones.
But to my question: What private OSes are there? Fairphone sells FP4s with eOS, how is that? And does it work on the FP5? GrapheneOS only works on Google Pixels right?
Honestly trusting the bootloader feels very risky
Ok what is your alternative? Android Verified Boot with a secure hardware keystore like the Google Titan M2 is basically the best thing you can get.
Strong encryption with a password you know only. The password should have a high enthropy
This is unrelated. You want to familiarize yourself with the concept of OS integrity and how it is different from data encryption. You can have a passphrase that encrypts your data alongside having access to these hardware features.
It has very minimal code and its implemented in a robust manner. Unlike UEFI and the desktop implementation of secure boot, it does work well and it has not yet been exploited on pixels. Its way better to have any kind of OS integrity check than none.