I can't find Siri on my iPhone 4s?

I just updated to iOS 7.1.2 and now I can't find Siri in my setting I just want to turn my microphone back on for texting.

Pull down for the 'Search iPhone' Type in Siri and locate. Then move to better location. Best luck.

You probably turned it off. Go to settings -> general -> Siri and turn her on again

Hold the home button.