With Vodafone, you don't need to make a call, the sim is already able to work when you buy it. The problem about the call is with Tim card
[COLOR="Magenta"]"Working" PrePaids: Wind, Vodafone, CoopVoce, , Travelsim (2), 02 Irish (2)
My best sim?--> Wind +39-328
My phones:
Samsung Galaxy Next S5570