- https://sailfishos.org - https://docs.sailfishos.org/Support/Supported_Devices
They have few devices of their own (new one coming out this October) and they officially support many Sony Xperia devices. There are also many community ports.
- https://ubuntu-touch.io - https://devices.ubuntu-touch.io
They have 33 supported devices, some are being shipped directly with the OS or have an official agreement with the phone maker, while others are community ports. Even if community ports, they all seem to have high hardware support, and is all very clearly documented.
- https://puri.sm/products/librem-5 / https://pureos.net
They focus just on the Librem 5, and not everything is fully working but as I said they prioritised privacy and FOSS. The phone is old but the OS is still in active development.
- https://postmarketos.org - https://wiki.postmarketos.org/wiki/Devices
They focus on supporting as many devices as possible, currently they don't have "main" devices they support, but they plan to. They too have a very clear documentation on features available for each device.
- https://mobian.org - https://wiki.debian.org/Mobian/Devices
They target devices made with the intent of running linux, but also have a few ports to android devices.
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You'll notice that there are a few devices that are more "linux-friendly" and that are supported by many of these OSes. Phones from Pinephone and Fairphone being the main ones.
> prioritised privacy
Privacy depends on privacy patches/protections and on security patches/protections. They do the opposite of taking it seriously from the hardware through the software.
None has anything close to the privacy or security of AOSP or iOS. Librem 5 is the direct opposite of hardware prioritizing privacy and security. It doesn't provide basic firmware updates, uses a bunch of extremely low security components and brings the awful privacy and security of a desktop OS to mobile on top of that. It's the opposite of how you're describing it. Purism's devices also aren't open source as they claim but rather are closed source hardware with closed source firmware. They only pretend it's open hardware and firmware by not shipping the closed source firmware with the OS, which leaves users without crucial privacy/security protections. The components don't have proper updates available regardless due to their hardware choices but they don't ship what is available and prevented doing it for some components.
> They target devices made with the intent of running linux, but also have a few ports to android devices.
AOSP is a Linux distribution. Linux doesn't mean glibc, systemd, GNU coreutils and GNOME. If you mean GNU/Linux or bringing systemd to mobile then that's what you should say.
So, I upvoted you, but I have to say that most of these seem to target old devices, released 6 or 8 years ago or more, which have long stopped being sold (and may not even be easy to get second-hand).
I think this is all a bit optimistic. E.g. when I last looked a the Sony phones supported by SailfishOS, there was only one old model that had reasonable support. Newer phones would boot, but missed support for many hardware features.
E.g., on the XPERIA 10 IV, the camera and mic doesn't work, which makes it hard to use as a phone:
https://forum.sailfishos.org/t/functional-state-of-the-xperi...