Currently Being ModeratedJan 25, 2013 8:30 AM (in response to muddhead67)
Siri cannot be deleted by a user (there's nothing to "delete", per se). You may, however, have turned it off. Check the Settings and see if Siri is turned off there. If you don't see Siri listed at all, check the Restrictions in the General settings and see if perhaps Siri is disabled there.
Currently Being ModeratedJan 25, 2013 1:12 PM (in response to varjak paw)
You say it can't be deleted but it's not under restrictions either. Now what?
Currently Being ModeratedJan 25, 2013 1:27 PM (in response to muddhead67)
First, and forgive what may be a dumb suggestion on my part, confirm that you really do have an iPhone 4S, particularly if this is the first time you've tried to set up Siri.
If you're certain you have an iPhone 4S, you may need to restore your iPhone.
Currently Being ModeratedJan 25, 2013 1:28 PM (in response to muddhead67)
Reboot the phone.
Are you absolutely positive you have a 4S and not a 4?