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I have not taken delivery yet, but I have a VIN. On the "manage" page of my account, under the subject Autopilot, it says, "Your Model 3 is coming with Full Self Driving". I wonder if that means it will have the new HW3. I'm guessing so.
I’m in the same boat. My vin ends in 324xxx. I’m hopeful since HW3 has been delivered in some Model X vehicles already and it supposed to be an easy switch. My delivery is scheduled for 4/13. Here’s hoping.