Google's Near Field Communications payment solution Google Wallet has officially launched to the public.
The phone-based digital wallet NFC technology, which is currently only in place on the Samsung Nexus S handset, has been extensively tested and is now ready to trial in New York and San Francisco.
Google is only making the Google Wallet app available to Nexus S 4G customers on the Sprint network in the US, so it's still a pretty small sample that are able to use the service.
The app stores your credit card details then allows you to pay for goods or cash-in coupons at stores which are geared-up with NFC reader devices, just by flashing your phone at the sensor.