If you feel that your BlackBerry only rings a few times before going to voice mail, your ringing time is too short. This may not only be annoying, but can also make you miss important calls. Luckily, you can extend the ringing time on your BlackBerry. The ringing time is set up by your service provider. The first way to extend the ringing time is to simply call your provider and ask for an extension. However, if you don't feel like being put on hold until you can talk to a human being, you can send the provider a message right from your phone for a ringing extension.
Type "*61" into your phone.
Type "" then your BlackBerry phone number (including the area code) after 61. Type "*" again after your phone number.
Type "*" into your phone, followed by the number of seconds you'd like to extend your ringing time on your phone. You can choose from: 5, 10, 15, 20, 25 or 30 seconds of extended ringing time. Type "#" into your phone after you've typed in the seconds.
Press "Send" on your BlackBerry phone to send the extended ringing time request. For example, if your phone number is 0774 765 655, and you want to extend your ringing time by 15 seconds, you would type: _61_0774765655**15# followed by "Send."