Silent Phone Finder description

Silent Phone Finder(SPF) is an application for user to use SMS to find an android phone which is in silent mode or for an android phone that is using broadband sim card which can only receive sms but cant receive call.

1)Send a SMS with content 'SPF On' to the android phone which already installed SPF application.
2)Once the phone received the SMS, the phone will set the volume to maximum and ring a double beep sound continuously until user press the 'Dismiss' button which indicate user already found the phone.
3)User can send 'SPF Off' to turn off the double beep sound too.