Oh wow thank you for the fast replies guys.
I had a gander in the settings on the phone and it says I'm on 2.3.6 Gingerbread but Google says there is an ICS update or whatever it is for the S2 and that's all I was trying to do. I'll take it back on Saturday and see what they say. If not, I would appreciate the assistance very much. Thank you ever so much again.