FILE PHOTO: A man speaks on his mobile phone as he walks past a Bharat Sanchar Nigam Ltd (BSNL) advertisement painted on a wall outside its office in Kolkata, India, August 24, 2017. Picture taken August 24, 2017. REUTERS/Rupak De Chowdhuri
FILE PHOTO: A man speaks on his mobile phone as he walks past a Bharat Sanchar Nigam Ltd (BSNL) advertisement painted on a wall outside its office in Kolkata, India, August 24, 2017. Picture taken August 24, 2017. REUTERS/Rupak De Chowdhuri