Dialog Telekom Ltd, Sri Lanka's largest cellular operator said Thursday that its net profits for the third-quarter jumped 42 per cent as it aggressively expanded its subscriber base. Dialog Telekom Ltd, Sri Lanka's largest cellular operator said Thursday that its net profits for the third-quarter jumped 42 per cent as it aggressively expanded its subscriber base. Net profit in the three months to Sept. 30 was Rs. 1.7 billion, over Rs. 4.7 billion in revenue, the telco said.