I did lose navigation when I unplugged the modem. Might have lost more, but I don't use the satellite radio so I have no idea if that goes also.
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I've heard the same in the other Ford forum. I have disabled automatic updates from day one of getting the truck. There is really very little I need from the Sync system to enjoy my truck.The article says owners provide "Ford explicit consent via an in-vehicle touch screen." I have read that we do this when we consent to periodic updates of the on-board system and that one must consent to get the update. I do not know if this is true.
I do know my 2023 Tremor has asked me to approve updates via the in-vehicle touch screen.