Once done, you can activate Siri by saying “Hey Siri” out loud.
Go to Settings > Siri & Search and enable Listen for “Hey Siri”.Press and hold the Home or Side button.Once activated, there are a few ways you can activate Siri. To turn Siri on, go to Settings > Siri & Search and toggle Press Home for Siri on.
If you can’t talk to Siri, the feature may be turned off.