The company had reported a net profit of Rs.764.20 crore for the quarter ending December.
The firm said its revenue grew 5.2 percent to Rs.9,483.9 crore in the fourth quarter, compared to Rs.9,009.7 crore reported for the October-December quarter.
EBITDA margins expanded to 38.10 percent in the fourth quarter compared with 34.70 percent reported for the third quarter.
Voice realised rate improved by 4.4 percent from 31.8 paise/minute in December quarter to 33.3 paise/minute in March quarter, the company said.
In 2015-16, the mobile operator has more than doubled its past three years average capex spends with network investment of Rs.77.7 billion, it said.
