I now see why the pilots and aircraft engineers get uppity when people post garbage about their area of expertise.
Tri-To-Start
If you call a cell phone that's been destroyed or out of service you'll still hear a ring from your end.
If the phone is detached from the network, as recorded by the Home Location Register (or its successors, for the pedantic), the caller will not hear ringing. They will either get a message to say the phone is out of service, and/or redirected to voicemail.
If the phone is in service so far as the network is concerned, it will be paged in the last known group of cells ("Location Area"). If Colour Ring Back Tones are subscribed to, then you'll hear music while the phone is paged. If not, you will probably not hear anything until the phone responds to the page. It will then ring, and the caller will also get a ring tone.