Government of India’s agency, TRAI, setup a National Do Not Disturb Registry and invited customers to register their phone number. Once registered, it becomes illegal to make marketing calls or send such sms to that phone number. In reality, however, you still do get such calls/sms. Although the number and frequency may get reduced. So, it’s beneficial to some extent. Also, if you register in DND database, you can take legal action against such callers. Send an SMS to 1909 with the following text: START DND or START 0 If you want to block only certain types of calls/sms, you can do so by invoking DND only on specific sectors. Send the following SMS to 1909 START

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