If you buy a holiday gift or groceries , you will wave more barcodes and probably swipe credit cards too ; hence more silent electronic communication .
The smartphone is already the swiss army knife of the digital age , able to transform into a camera , music player or game machine at the swipe of a finger .
However , about 33 % said they do not trust devices with near field communications technology ( nfc ) that allow users to swipe their phones to make a payment at checkout and believe mobile payments will not gain a lot of traction by 2020 .