The Telecom Regulatory Authority of India (TRAI) restricted the mobile users from sending more than 100 SMS / day per SIM starting 27th September 2011, to prevent pesky marketing SMS. Now TRAI has increased the limit from 100 to 200 SMS / day per SIM after they received representations from some of the service providers and consumers to increase the limit of 100 SMS per day per SIM.
The customers can send more than 200 SMS / day per SIM on the blackout days such as New Year, Pongal, Diwali and Christmas. They could choose Partially Blocked DND category, where they will receive SMS in select categories or Fully Blocked (SMS ‘START 0′ to 1909 ) DND category. All the commercial SMS will not be allowed from 9pm to 9am even if the customers are in the Partially Blocked category.