Hey guys! I'm an American student who will be interning at the UN in Geneva this summer. I have a Verizon Blackberry Tour 9630. I understand I must unlock it first - and I will do that in the coming weeks. However, I still feel a bit overwhelmed about what happens next. When I arrive in Switzerland, do I buy a new SIM card (or do I buy it in the States)? Would this new card allow me to make calls to anyone in Europe? Finally, which carriers are most recommended and what pre-pay plans in particular (I am staying for 3 months)?

Many thanks in advance --