Share your experience!
It was working 3 months back with the following APN settings. But Now it is not 
Please anybody can help me? Thanks in advance!
Access Point Details
Name
TATADOCOMOINTERNET
APN
TATA.DOCOMO.INTERNET
Proxy
Not Set
Port
Not Set
UserName
Not Set
Password
Not Set
Server
Not Set
MMSC
Not Set
MMS Proxy
Not Set
MCC
405
MNC
034
Authentication type
Not Set
APN Type
default,internet
APN protocol
IPv4
APN enable/disable
APN Enabled
Bearer
Unspecified
Other Settings:
Network Mode
GSM Only
check this thread
http://talk.sonymobile.com/thread/56684
is Sony spying on users in this forum?
http://talk.sonymobile.com/thread/60197
Don't forget to mark the Correct Answers & Helpful Answers
UNRELATED topic, if you have some time please check this thread
indeed you did, it could be an app acting up such as antivirus, taskiller, or a faulty sim card
have you try to delete the current apn settings and re-add them?
Thanks!
Thing is i changed APN name as TATA.DOCOMO.INTERNETHVC
It is started working 
great news