[ubuntu-in] Configure Airtel GPRS in Ubuntu 10.10

[S. Kartik]

  Hi!
I have a Nokia E71 with airtel GPRS connection(Mobile Office). How do I 
access the net using this GPRS on my laptop running on Ubuntu 10.10 
using the data cable which comes along with the phone. I have gone 
through this site http://www.ubuntu-in.info/wiki/GPRS_Howto , this 
mainly talks of using bluetooth connection and I get stuck while editing 
rfcomm.conf : I am unable to type the settings into the file.
thanks in advance & regards
Kartik