I just purchased the app entitled Phone Locator for blackberry from Shi Zhuo from Blackberry app World for $1.99. Can anyone tell me why the ring phone feature does not work but the GPS feature does. I selected a ring tone and when I press try it rings but it does not respond to the SMS keyword as advertised. One keyword sends you coordinates of your phone a different keyword activates a ring feature so you can find it even when on silent or vibrate only.