The Model 3 is shipping with no fob. They are providing an RFID card instead. Most people will just use their phone, which when paired with the app, unlocks the vehicle as you approach. Does anyone know if this will be possible with existing S and X models? I obviously can unlock the car using the app, but it requires opening the app and pressing the unlock button. It seems the Model 3 will do this passively. I read that it involves Bluetooth communication. I wouldn’t mind having one less item to carry with me. My main concern about leaving the fob behind currently is any issues with connectivity. It currently involves the cellular connection to the car rather than local Bluetooth.