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Originally Posted by sahajesh
Because the phone unlock takes a few minutes.
Jaguar do something similar with a wristband (looks like a Fitbit) using NFC (I guess). If you are doing something sporty and can't easily carry keys, the wristband will unlock the car and I presume be used to start the engine.
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Well the phone unlock via the app takes a few minutes. Unlock via the NFC feature is pretty much instantaneous.
The M850i has the Digital Key system and it says you can pair a NFC equipped phone with the keycard and use the phone to unlock and start the car.
https://f92.bimmerpost.com/forums/sh....php?t=1506312
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BMW DIGITAL KEY- NFC technology allows 8 Series Coupe to be locked / unlocked from smartphone by holding it up to door handle
- Can be shared with up to five other people via BMW Connected App
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