The SIM card is already in your phone. You just have to phone verizon and ask them to activate the global roaming plan.
As I said in this post
http://forum.ppcgeeks.com/showthread.php?t=109585...
I used the Imagio in Global mode while I was in Turkey. Verizon has a great plan that is basically $2 a day for unlimited internet abroad. I was worried, because the Verizon map did not show 3G service in Turkey. But as it turns out, everything worked VERY well. Fast enough speeds for all basic activities. I was able to use it via Skype to make phone calls without issue. I was able to tether it to my laptop and get internet on my computer basically anywhere. The most life-saving part was that I was able to use Google maps to navigate the very confusing streets of Istanbul. Everything just worked.
I can't say the same thing about blackberry phones though- other members of my family have the Tour and Storm 2, both World Phones. For some reason, they could not connect to 3G service abroad- the phones ended up freezing every few minutes and had to be restarted. The only way to fix it was to switch the phone to 2G mode.