The real breakthrough, however, will come with the marriage of the Googlephone to Google Voice, the Californian company’s high-tech phone service. Google Voice gives US users a free phone number and allows unlimited free calls to any phone in the country — landline or mobile. International calls start from a couple of cents (just over a penny) a minute. Google Voice also uses sophisticated voice recognition to turn voicemails into emails, can block telemarketing calls automatically and offers free text messaging.

Google sounded its intentions two weeks ago when it purchased a small company called Gizmo5, which had developed technology to connect Google Voice with voice-over-internet (Voip) networks such as Skype. Now Google has the means to offer a complete, end-to-end phone service, with which consumers can make and receive calls between the Googlephone and other phones or computers anywhere in the world, and often for nothing.