Truphone is a mobile Voice over Internet Protocol (VoIP) application that routes calls across the Internet.

Truphone promises three easy steps to get your iPod touch working as a phone. First download the free Truphone software from the , plug your iPhone headphones into the Microphone Adaptor and then into your iPod touch. Finally open Truphone on your iPod touch and follow the instructions.

You will then be able to make free calls to other Truphone, Skype and Google Talk users, make local cost, national and international calls to landlines and mobiles, and Instant Message your Skype, MSN Messenger, Yahoo! Messenger and Google Talk contacts.

The Truphone Microphone Adaptor costs £9.99 (US$14.67). The pack also includes a 'Double Credit' scratchcard, when you top up £5, Truphone will double it to £10.

In February Truphone launched the service, billed as the world's first true commercial multi-country single-SIM mobile service that makes it easier than ever to make international calls while still keeping costs down.