Using your phone as a vibrator without downloading any apps is a bit unconventional, but there are a couple of ways you can achieve a vibration effect:
### Using Phone Features:
1. **Alarm or Timer**: Set an alarm or timer on your phone to go off for a few seconds. When it vibrates, you can hold the phone against your body. Ensure your phone is on "vibrate" mode.
2. **Text Messaging**: Send yourself a text message while the phone is in vibrate


