I have an iphone 4s and siri is not under my settings menu? I have restored my phone but but nothing. Help please

Are you sure it is an iPhone 4s and not an iPhone 4...

Identify iPhone Models

http://support.apple.com/kb/HT3939

Is the phone updated to iOS 6?

Are you certain it is a 4S?

Have you ever used Siri on the phone?

You posted in the iPad forum instead of the iPhone forum. To get answers to your question, next time post in the proper forum. See https://discussions.apple.com/index.jspa I'll request that Apple relocate your post.

 Cheers, Tom 😉