Open Settings
Tap Sounds & Haptics
Tap the sound you want to change, such as Ringtone or Text Tone
Tap Vibration
Select a built-in vibration pattern
Tap Create New Vibration to make a custom pattern
Tap Save
To change vibration for alerts, repeat the same steps for each alert type
To turn vibration on or off, go to Settings
Tap Accessibility
Tap Touch
Tap Vibration
Toggle Vibration on or off