Siri gone from after update os in settings
Siri setting gone after os upgrade of ios
Siri setting gone after os upgrade of ios
Siri is on the iPad 3, iPad 4, and iPad Mini. If you have one of those, you should see it at Settings > General > Siri
If you don't, maybe it's restricted. Check Settings > General > Restrictions
I assume you have iOS 6 (or 6.0.1).
Siri gone from after update os in settings