I was using a jailbroken 1.1.4 and then upgraded to 2.02. To my surprize I found that Apple has removed the ability to edit the edge ( APN ) settings on the new software releases and as a result of which my iPhone was not able to connect to the Vodafone Live - in India.

The reason is because Vodafone India changed the APN from www to iphone which resulted in the new Software releases not to activate Edge.

After hours of breaking my head finally I was able to fix it.

The Fix.

Downlaod

carrier.plist ( RapidShare: Easy Filehosting )
and
preferences.plist ( RapidShare: Easy Filehosting )

and then replace the files at the following location
carrier.plist : /System/Libray/Carrier Bundles/Vodafone_in.bundle directory
preferences.plist : /private/var/preferences/SystemConfiguration directory

Do remember to back up your existing files. Thats it.

Also, do remember to restart your iPhone.