Truphone is claiming to be the world's first 4G network operator.
The company has developed software infrastructure that will allow mobile phones with Wi-Fi to make calls and send SMS messages using only Wi-Fi and the Internet. When a Truphone-enabled mobile handset is out of Wi-Fi range it reconnects to the mobile network, allowing customers to roam between the two networks.
The company completed its service testing using Nokia's new E-series handsets, the first mobile VoIP, Wi-Fi handsets from a big name manufacturer. Others are set to follow with Wi-Fi functionality on mobile phones to become commonplace rapidly.
The company is also developing mobile VoIP applications for the millions of smartphones already in circulation, aiming for mass market availability of free and low-cost mobile phone calls by the end of 2006.
It is compatible both with private, home or office Wi-Fi networks, and with public Wi-Fi hotspots such as those found in cafes, hotels, airports and bars.
Although the precise definition of a 4G network has yet to be agreed the characteristics of a 4G network are generally accepted as: high data rates, all-IP infrastructure and the use of open Internet standards.
When users are both connected via Wi-Fi, the call is routed entirely over the Internet and incurs no mobile operator charges, even if the caller and recipient are on opposite sides of the world. If only the caller is connected to Wi-Fi then call charges are significantly reduced.
Using a commercial public Wi-Fi hotspot incurs a low, generally flat-rate fee. In addition to inbound and outbound calling, Truphone also delivers SMS, presence, and voicemail and will be available in pre-pay and post-pay.
