If I wanted to buy a new phone that I could root, install a custom ROM on, and use without voiding the warranty, what's the current best bet? One Plus used to be pretty good, but they've gone down in freedoms and up in price. Samsung are an obvious no. The entire design of the iPhone is specifically aimed at keeping the user out of it. Linux phones aren't usable yet. The shop on the /e/ foundation website seems to be…
Any Sony Xperia: https://developer.sony.com/develop/open-devices
> Certain pre-loaded content on your device may also be inaccessible due to the removal of DRM security keys. For devices running recent software versions, for instance Xperia Z3, the removal of DRM security keys may affect advanced camera functionality. For example, noise reduction algorithms might be removed, and performance when taking photos in low-light conditions might be affected. The secure user data partition may also become inaccessible, and you will not be able to get any more official software upgrades if you unlock the bootloader.
Thanks for the thought though. I like that they have a page at least.