Haven't tried this but.........from another user on an old post...........
Anonymous
Not applicable
18-03-2024 03:31 PM - edited 18-03-2024 03:33 PM
The code to increase the ringtone to 30 seconds used to be **61*YOUR NUMBER••30#. I’ve used it myself but not for many months so can’t guarantee it’ll work. It’s the correct code as was as I’ve got it stored in my contacts list for some reason.
Obviously replace the 30 with 15 for 15 seconds.
