O2 are giving away pas as you go SIM cards simply for filling in a short form. You also get free unlimited calls and texts to anyone on O2 when you top up with just £15. Thats not all, with this freebie you also get upto 10% back on your tops ups every three months to spend on things you like .. from O2 of course.
That could be extra credit, tickets for gigs and other phone related stuff. To claim your free SIM click the image below and fill in the form.