Supermarket Retailer Tesco Plc has launched a service called ‘TalkWiFi’ that allows mobile phone users to make free and low cost VoIP calls over WiFi.

Provided in partnership with Freshtel, the service can be downloaded to Nokia’s N95,N81,E65 and E51 phones with plans to make the service available to other phone models by the end of the year.

The network works by connecting calls made while in an unrestricted WiFi to the Internet thus offering significant savings to the caller.

With TalkWiki, a call to Australia would cost just 1.5p per minute while calls to other TalkWifi customers are free of charge, even if the other user happens to be abroad.