Change ring time on Next G phones

Hi guys,
It seems that the factory default setting is for 15 seconds, so by the time you register that your phone is ringing and then find it and answer it, often it's too late and you've either missed the call or it's gone to message bank(which then costs you $ to retrieve!). So, to extend the ring time before diverting to message bank, here's what you do.

on your phone..type **61*101**25#

then.... send
The screen should show something like..."requesting"
then hit OK
Done.

If you have vodaphone, type 333 instead of 101, or for optus, type 321 instead of 101.(I only have a Telstra phone so I THINK these are correct)

The 25 is the number of seconds you now have of ringing and can be changed in increments of 5 seconds up to 30, but I have heard that if you set it for maximum of 30 seconds, after six months it will revert back to 15. Then you'll have to try to remember how you did it six months ago. Rus.

p.s. as usual someone will say this is not correct but it works for me.