The DoT, in a recent letter to the Ministry of Health, citing applications, said, ‘After a lapse of almost 21 months, these announcements have served the purpose of creating awareness among citizens and have no relevance now. is not.’’ The message being played over the ‘‘network runs the risk of interception and delay of important calls during emergencies and consumes precious bandwidth resources, the letter said. This increases the burden on the TSP network and delays the call connection. According to the letter, it also affects the customer experience as calls get delayed at times in case of emergency. TSP has also been requested to disable RBT (Ring Back Tone).