Quote:
Originally Posted by Twitch Massacre
Yes there must be some protocol for keeping the key communicated long range. I'll have to ask my friend with the 7 series but it could also be possible that the key is paired to your smartphone vie Bluetooth LE and then piggybacks off of the phones cellular connection, but I don't recall him mentioning anything about pairing it to his phone. If it has its own GSM connection I wonder how it impacts battery life.
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Maybe that's why they went through the trouble of building a charging tray into the car...