Vodafone manual GPRS settings

For Karnataka & Andhra Pradesh: (This setting is tested by myself in Bangalore)

Account Name: Vodafone_gprs
Homepage: http://live.vodafone.in
User Name: (no need)
Pass: (no need)

Access Point Settings:

Proxy: Enabled
Proxy Address: 10.10.1.100
Proxy Port: 9401
Data Bearer: Packet Data

Bearer Settings:

Packet Data Access Point: portalnmms
Network type: IPV4
Authentication: normal
User Name: (no need)
Password: (no need)

For Tamil Nadu:

Account Name: Vodafone_gprs
Homepage: http://live.vodafone.in
User Name: (no need)
Pass: (no need)

Access Point Settings:

Proxy: Enabled
Proxy Address: 10.10.1.100
Proxy Port: 9201
Data Bearer: Packet Data

Bearer Settings:

Packet Data Access Point: portalnmms
Network type: IPV4
Authentication: normal
User Name: (no need)
Password: (no need)

Anyone of these settings may also work in other states of India. I would like to thank Tech Bangalore commentators Mr. Ameer Ali & Churchill for sharing this valuable information.