Does a Isim card work for a Sidekick 2008?

My friend bought me a sidekick from the USA, and we decided that we wanted to give the Isim card a try? So i just wanted to know, is anyone out there that has the Sidekick and uses is not in the USA with a other sim card, does it work?
Update: I tried to watch the link, but it doesn't work for me :S
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