It's a little bit boring to buy one sim for each country you visit

but if you' ve the time, you can do it. Will you receive a lot of calls? If so, it's better for you to buy an international sim like Travelsim (free incoming calls).
Here--->
http://www.prepaidgsm.net/en/germany.html the german's sim
[COLOR="Magenta"]"Working" PrePaids: Wind, Vodafone, CoopVoce, , Travelsim (2), 02 Irish (2)
My best sim?--> Wind +39-328
My phones:
Samsung Galaxy Next S5570