Are you constantly trying to find your phone because you know after that 15 seconds it
will divert to MessageBank and you'll miss the call?
It's even more annoying if it's a call from a blocked number
In the depths of Telstra's website there is a guide explaining how to extend that
ring to a maximum of 30 seconds but of course no-one casually stumbles across it.
Call **61*101**seconds# to extend or shorten it.
So if you wanted to extend it to its maximum (30 seconds) you would dial
**61*101**30# and then hit send
Other possible timings are 15, 20 or 25 seconds.