Several of India’s mobile networks are playing a 30-second information alert about coronavirus before the start of every phone call.
Jio, BSNL, Airtel and Vodafone are among those to have adopted the move after a request from the government.
The message, in English and regional languages begins with a person coughing and is heard instead of a ringing tone by the caller.
However, several websites have published a way to silence it, after complaints it was becoming annoying.
It contains information about the virus and its symptoms, and is heard only by the caller – it is not a default handset ringtone.
The tune also has not received much media coverage but it but it has raised a few eyebrows.