What if we could have a Silverblue Phone Edition?

Unless they’ve got some hardware which has yet to be released, the modem will
require proprietary firmware (thank the FCC + vendors for that), and the
bootcode will require non-free initialization firmware, similar to other
Purism devices. I cannot speak for other parts of the device, because I
haven’t seen what’s on there, but it’s likely the same will be true for the
wifi and GPU.