BSNL subscribers in districts of Karnataka including Bangalore, Bidar, Bellary, Bijapur, Chikmagalur, Davangere, Gulbarga, Kolar, Mandya, Mysore, Raichur, Tumkur and Belgaum will not be able to access BSN’s broadband services between 1a.m and 5a.m on Wednesday. This is due to upgradation work to be carried out during the period.