07-02-2008 12:12 PM
You can try the following:
A) The simplest method is to call your carrier and request a longer ring time, up to 30 seconds.
B) If you have a GSM based phone, some have had success by dialing this number from your phone: **61*XXXXXXXXXXX**30#
For example, the T-Mobile voice mail access number is 18056377243, and thus the string to dial would be **61*18056377243**30#