I have a OnePlus 13. Best hardware ever. Running lineage with microg + magisk and use nix on top of termux to install stuff using sudo, including AI harnesses - it's my portable AI workstation now.
I've ordered a physical keyboard that attaches to the back of the phone using magsafe to make it easier to use. I wouldn't be surprised if we see new types of hardware or at least new mobile UI paradigms that make AI coding on the go easier.