Want your phone to vibrate or play a sound when someone is typing a Snapchat message to you? Follow these steps to enable this notification.
1. Open SnapChat. Swipe down and select the settings gear.
2. Select Notifications
3. Enable Sounds. This will enable push notifications and will play a sound (or vibrate) when you receive content like Snaps or Chats.
Now, each time you see the Snapchat notification someone is typing “…is typing” your phone will ring/vibrate depending on your ringer mode.