Just in case anyone wants to increase the length of the ringtone on the IP4 AND CERTAIN OTHER MOBILES...........TO A MAX OF 30 SECONDS

just enter it as you would if you were dialing it as a telephone number then just press dial as if making a call.where it says number of seconds, replace with 30 which is the maximum length of ringtime before going to voicemail.

So : **61*901*11*30#[call]
where 30 is the max time you can set it to either 5, 10, 15, 20, 25 or 30 ,,,,,,,,,

I KNOW OTHER BRANDS OF PHONES AND SERVICE PROVIDERS RINGTONES CAN LAST UPTO 60 SECONDS ...