Do you happen do know if you can roam on CrDroid? This is a very under-reported bug, but I have heard from others with the same problem on Reddit. On Paranoid Android, Omni, and Carbon ROM, com.phone.android crashes repeatedly when the phone tries to connect to a roaming cell phone network. No phone or data connectivity. This is a problem with the ROMs (as opposed to the Gapps dialer like some have speculated) because I get this error immediately after flashing the ROM and during initialization of the phone if I use an overseas SIM. The only ROMs not affected by this bug AFAIK are stock and LOS.
It doesn't happen with Carbon ROM I have tested that.