Hilton's new smartphone Door Key

Hilton will let you use your smartphone, Android or iOS, as door key to unlock your hotel room.

Hilton app apart from unlocking your door, will let you choose your preferred room, make special requests, check in and check out.

From 2015 you won’t even need to speak to staff when it’s time to leave.

Room selection will be available in over 4,000 Hilton-affiliated hotels by the end of the year.

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