For 2g data balance dial:
For 3g data balance dial: *123*11#
For 3g time based plan: *123*12#
For night data balance: *123*31#
Both 2g and 3g data balances will be displayed as flash message or as message on your mobile.There is no specific codes to know the balance data in the account.
For BSNL 2g network just dial : *123# the balance data will be shown along with the a/c balance.
For 3g network,just send the message “DATA 3G” without quotes to the no.: “53733”.
For vodafone please dial : *111*2*6*2# and follow the flash message instructions to get the usage balance.
For knowing the data balance in docomo network please dial: *111*1#
For reliance to know data balance just message the following “mbal” without quotes to 55333.Through this message we can know the 3g and 2g data balances.
For aircel’s data usage dial : *126*6#. or *126*4# or *126*3#.