Comment by arkadiyt

When I removed the DCM the in-car microphone stopped working, but I bought one of these to get it working again: https://www.autoharnesshouse.com/store/AHH-DCM77.

Also even with no modem, if you use CarPlay on your phone _via Bluetooth_ then the car will just use your phone's internet connection, so I only use CarPlay via a wired USB connection.

Aside from that the car works great, everything is 100% functional. I suppose I don't get OTA updates, which I'm fine with.