Phonehook isn’t the only program known to cause the issues, do you have AlienDalvik-Control or any other apps that uses overlays installed?
You need to get to the Recovery Mode shell, uninstall these programs and probably have to unlock your home-partition, mount it, chroot into the /rootfs and try to fix the uncompleted update by installing the remaining packages.
Here is my struggle to fix Xperia 10 from failed upgrade back into working, maybe some of the step there helps you get started.