I think Travelsim is the best offer even if sms are not very cheap, but you can call in Chili, Bolivia, Panama, New Zealand, and Japan. Take a look
http://travelsimshop.it/?ref=V8OEK
[COLOR="Magenta"]"Working" PrePaids: Wind, Vodafone, CoopVoce, , Travelsim (2), 02 Irish (2)
My best sim?--> Wind +39-328
My phones:
Samsung Galaxy Next S5570