If you are thinking of pranking your friend then you can use the Nuclear Siren Prank Simulator app.

To play the nuclear alarm siren click on the app icon displayed on the screen and to stop the siren click it once again.

If the Nuclear Siren Prank Simulator app is minimized then also the nuclear alarm siren will keep playing in the background.

So insert this nuclear siren sound simulator into your mobile phones to prank on your friends.