How To Type to Siri (Instead of talking)
Talking to Siri in public can be really weird and sometimes inconvenient. Luckily, you can ask Siri questions by typing instead of using your voice.
With Type to Siri activated, when the Home button is pressed to activate Siri, it brings up the keyboard and an option to type a command to Siri. Typed Siri commands work exactly like spoken Siri commands - Siri will respond to questions like "What song is playing?" or "Where the nearest Starbucks?"
- Tap Settings
- Tap General
- Tap Accessibility
- Tap Siri
- Toggle Type to Siri
Also, be sure that your phone is on silent, or Siri will blurt out your answer out loud.
You can read more here.