There might come a time when mobile payments do not even involve having a mobile device on hand.br In an announcement on Wednesday, Google unveiled Hands Free, a new app which would enable users to pay for purchases simply by using their voice.br Hands Free uses a pretty clever combination of tried and tested technology such as Bluetooth low energy, Wi-Fi and location services in order to allow the app to communicate with cash registers in participating stores.br In order to confirm a purchase, a user would simply need to utter the words, "I'll pay with Google.