OK, so the silent ringtone in the last message crashes my phone quite quickly...
If you answer the call it kills the audio both in and out so the call doesn't happen - ever again until you turn off the phone and turn it on again! When you hang up the vibrate will just keep going on and on... not good. The fact it vibrated at all was bad enough!
So... I've made another one, this time it doesn't crash my phone and there's no vibrate - well ok, there's one vibrate after 2 minutes of ringing... but I'm guessing either the person calling or the network will have given up ringing your phone by then... the bad news is that it's slightly bigger...
Enjoy...