I have pretty much given up on the prospect of running a full fledged FOSS OS on devices that don’t give access to the bootloader’s root of trust, or give you a userland that works with a kernel you can’t control (eg Crouton). It all sounds great until you start trying to do actuall work. As soon as you need anything that’s not provided by the manufacturer software image you start to notice all the foundational thing…
I'm on the lookout for a solid system that can boot a vanilla Linux kernel (something like an x86 laptop or ARM laptop, sub 10 inches preferably) that can make phone calls, receive SMS, and has a built in 4G modem.
Does such a thing exist? I'd rather have a crap phone attached to a powerful computer, than a powerful phone that locks itself down so much that it's a crap computer.