We added a new iPhone 4S to the family today and I've noticed some things that are different than my iPhone 4S which was purchased on release day (Oct. 14th?). Both came from AT&T. First thing I noticed is that the weather app in the notification center looks fairly different. I checked the settings and they are identical (there really aren't any that change the way it displays anyways). My October 4S: Brand-new 4S (100% defaults): Other than that, the only other thing I've noticed is that Siri sounds way more robotic on the brand new 4S than she does on my Oct. 4S. Again, settings are identical (English US on both), so I don't understand how there is any variation. Info from within settings/about shows that my Oct 4S is model MC922LL and the new one is MC924LL. Both are 16GB though the Oct model is black and the brand new one is white. I'm not sure why two 4S's are differing in things this "drastic".