If you are having problem with Vodafone gprs so you can check your settings here.
Settings name: Vodafone live!
Home page: http://live.vodafone.in
APN: portalnmms
Use proxy? yes
proxy address : 010.010.001.100
Authentification type: PAP
port- 8080
Login request: off
User name: <blank>
Password: <blank>