If I'm not mistaken Siri is a 4s thing. I believe it requires the a5 I could be wrong. When I had iOS 5 on my other iPhone Siri was missing. Only the 12th will tell but I wouldnt be disappointed if it's not there.
Please start looking at the post's before you start a post. This is the 5th post about the same thing and its taking up way to much room and time of the moderators to keep closing these post's out. Thanks
May I respectfully make a suggestion that the link posted above be moved as a sticky to this forum? Everyone keeps saying there are posts all over the place about Siri and Iphone 4 integration, but I'll be darn if I can find that many in search. They all keep getting locked.