Open the Settings app
Tap Siri & Search
Turn on Listen for “Hey Siri” or Listen for “Siri”
Turn on Press Side Button for Siri or Press Home for Siri
Turn on Allow Siri When Locked
Follow the on-screen setup prompts
Choose your Siri language if needed
Choose your Siri voice if needed
Set your preferred Siri responses if needed
Test Siri by saying “Hey Siri” or pressing the Siri button