First off, the 9300 communicator (at least through cingular) does not support the profiles on the mac to be used as a bluetooth modem. I have seen scripts online to change this, and I have seen people manually edit them as well.
After that simply pair the phone and select "use this as my internet connection" and make sure to check "uses a higher speed data connection"
you will need to get some settings from your provider in India. At the very least you will need a telephone number to access (not a dial up number). For cingular it was *99# and changed to ISP.CINGULARGPRS.COM
you will also need a login name and password.
Select the proper modem script (nokia 3G GPRS 1)
To connect open internet connect, select bluetooth, and clock connect.
If it won't open the communication device or any other error try a different script. More can be found at this site.
http://www.taniwha.org.uk/
If the computer disconnects go into system preferences> network> bluetooth> under the PPP tab select PPP options. Turn off "Send PPP echo packets"
Hopefully this will work. If the people at your cell provider can't provide the settings try visiting a store and getting them from the settings on a PDA or Smartphone.
Brian