Just seen today that they've updated their free sim offer to include unlimited calls and texts for £15 per month no ties, that's better than my hubby's work contract he has with a certain red rival company! Best offer I've seen around, now lets see who adds free data!
P.S. apologies if this has been mentioned before, saw an old thread about the sims but I think it may have been a seperate deal :)
****The unlimited factor appears to be O2 to O2 only.