Also to know is, why can I not set up Hey Siri?
Go to Settings. Tap Siri & Search. Turn off Listen for "Hey Siri," then turn it back on. When the Set Up "Hey Siri" screen appears, tap Continue.
Furthermore, why is Siri not detecting my voice? On your iOS device, go to Settings > Siri & Search, and make sure that Listen for "Hey Siri" and Press Home for Siri or Press Side Button for Siri* are on. Also, go to Settings > General > Restrictions, and make sure that Siri & Dictation isn't off. Restart your iPhone, iPad, or iPod touch.
Hereof, why is Siri not working on my iPhone?
If Siri is not working, make sure that Siri is enabled by going to Settings -> Siri & Search and looking at the three switches at the top of the menu. Make sure the switches next to Listen For “Hey Siriâ€, Press Home for Siri, and Allow Siri When Locked are green and positioned to the right, otherwise Siri won't work!
How do I activate Siri by voice command?
2 How to Enable Siri
Launch the Settings app on your iOS device. Scroll down and select Siri and Search. Choose whether to enable Siri by voice with Hey Siri or choose to just push the button for Siri. Tap Enable Siri.