Note that you can get the full settings by using the USSD code for the BSNL network as follows. You can get internet settings for BSNL 2G/3G , delivered on your mobile by sending an SMS GPRS to 53733. This will then return your settings to you.
BSNL APN Settings
|Access Number||*99# or *99***1#|
|Port||9201 for Wap 1.0 device8080 for Wap 2.0 device|