APN number means Access Point Name is used for connecting with internet i.e if you are using mobile internet or Dongle that is also known as USB modem then it is necessary to put APN number in setting option.
For Different Network operator or ISP(internet service provider) use different APN number so that now i am providing list of APN number for you.i recommend to you that write all APN number in your diary or bookmark this page for future use.
2.Aircel – aircelgprs
4. vodafone -www
5.Tata Docomo – TATA.DOCOMO.INTERNET
7. Reliance – rcomnet / rcomwap/smartnet
10- Videocon – vgprs.com/ vinternet.com