Companies such as o2, Eircom, Perlico, Screenclick and more are using this avenue to attract potential new customers.
All you have to do is try out an offer from one of these companies and then get some friends to do the same. Simple !!!
For example you can sign up to the Screenclick Free 2 Week DVD offer. They send you a DVD in the post. You return it to them in their Freepost envelope. If you don't like the service you cancel it but you still get to claim your free iPhone. If you like the service keep using it and get your free iPhone too.
There are also lots of other items to claim instead like laptops, mp3 players, flat screen tv's and more.