Mobile network operators now need to send information about the usage to data users at every 10 MB of data consumption except customers opting for special schemes like add-on packs, combo offers and others. The consumers are to be provided with an option to opt out if they do not desire to receive such information.

For customers using special data packs, the operator has to compulsorily inform the customer whenever the limit of data usage reaches 50 percent, 90 percent and full exhaustion of the allotted data limit.

The Telecom Regulatory Authority of India (TRAI) also ordered the operators to intimate customers when the data balance available in the account reaches 500 MB, 100 MB and 10MB.

"Further the consumer shall be informed about the details of tariff applicable after exhausting the data limit, when the data limit reaches 90 percent or the data balance available in the account reaches 10MB," TRAI said in a note.

Operators also need to send an alert to international roaming customer cautioning the person to deactivate data service if one does not intend to use data services.  TRAI ordered the service providers to implement the same by November 1 this year.