Welcome to Android Forums! Sorry for the slow response.
Without knowing your carrier, I can't be sure, but I'll give you the best information I could find. The Galaxy Note II uses a micro sim card, where the S2 uses a normal size sim card.
I hope this helps! If not, there are two avenues: You can re-submit your question with additional info the same way you submitted this one, or you can join the forums for a better back and forth exchange of info.
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