BSNL, Chennai circle has announced that their customer service centres will function on Sundays also.
A press release from Chennai telephone Circle regarding this:
As demanded by customers, BSNL Customer Service Centres functioning at Chennai Anna Nagar, Kellys, Anna Salai, Mambalam, Adyar, Guindy, Chromepet, and Kodambakkam will function on all Sundays.
During the month of February, the 2 Sundays on 21st & 28th the above customer service centres will function between 9.30 AM & 5.00 PM.
All regular services will be available.