i used to own one of the early Blackberries and Bell was my service provider and i managed to get a string of numbers & symbols that allowed me to increase the number of phone rings on my Blackberry from 3 to 6 using the same default ring tone.
how can i do this with my 8300 curve with Rogers as my service provider?

Try this

Increase the amount of rings before calls to my BlackBerry go to voicemail? - BlackBerryFAQ

E-

The information in FAQ does not work as there is not enough room to input all the digits

Did you read the full FAQ?

The line that says, "This does not work on Rogers"?

You will need to call your carrier and ask.

Good luck.

I called Rogers in the past regarding this and they told me that their network can't change the number of rings before the VM kicks in.

HM.