This is the correct answer.
The boot ramdisk (loaded with the kernel) after 10/21 need to include an additional telephony component from the main framework, or the phone process will crash. So either someone will need to compile the trim kernel with the new ramdisk, or revert the change in the main framework and rebuild the ROM.
I have com.android.phone frozen. On the last three nightlies, the trim kernel is working with no crashes (so far). HD+
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