At some hotels, guests can use smartphones for check-ins and room keys. In some cities, public transit passengers can pay for fares by waving a smartphone across a terminal as they board a bus. These payments apps make use of ___________________ technologies.

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The Answer of At some hotels, guests can use smartphones for check-ins and room keys. In some cities, public transit passengers can pay for fares by waving a smartphone across a terminal as they board a bus. These payments apps make use of ___________________ technologies.

At Some Hotels, Guests Can Use Smartphones for Check-Ins and Room