If yes, Whistle to Find is an app just for you.

Features:
- Just whistle to configure and get started
- Sound/Vibrate/Flash alert modes
- Customizable ringtone & volume
- Customizable time for which the alert plays
- Auto start app when phone is put on silent
- Pause whistle detection when not needed eg: in office hours
- Auto adjusts sensitivity based on Android device
- Customizable sensitivity
- Widget for easy enabling/disabling
- Low battery usage

Just enable the app and free yourself from the tension of finding your phone. Now your phone will tell you where it is by ringing/vibrating/flashing, you just need to Whistle to find it.