140 series is assigned for tele marketters - The regulator says that as per telco data from January-March 2024, less than 0.2% of users make over 50 calls a day if a user calls more than 50 calls /sms every day from normal mobile phone - then they will be monitored.. TRAI suggests that telcos should check with those receiving these calls to verify if they were commercial calls. The regulator defines additional criteria for determining individuals suspected of spam like call recipient diversity (those with more than 60% unique recipients), average call duration (calls last less than 10 seconds), number of unanswered calls (over 50%) and the ratio of incoming to outgoing calls (less than 0.2 in a day) https://www.medianama.com/2024/09/223-trai-consultation-paper-review-2018-spam-regulations/ given warnings To improve detection of senders of bulk messages and calls, feedback can be taken from the recipients of calls from the people making more than 50 calls and 50 messag...