Aditya Birla Group company Idea Cellular?s third-quarter profit fell 4.7% to R228.5 crore from Rs 240 crore in the September quarter. In the previous quarter, the company had received dividend payment that led to higher profits after tax and, hence, not strictly comparable. The fourth-largest telecom company by subscribers clocked revenues of R5,578.5 crore in the December quarter, a 5% rise from the R5,314 crore in the quarter ended September. ? Quarterly revenue rose primarily due to expansion of voice minutes that rose 5.2% to 132.2 billion minutes compared with 125.6 billion minutes in the second quarter,? said Himanshu Kapania, CEO, on Tuesday. However, the company saw its average revenue per minute fall 41.1 paise per minute from 41.3 paise per minute in the preceding quarter. The challenge on ARPM is on account of fall in the ?non-voice revenue? contribution to 14.6%. Regarding price tariffs, the company said there would not be a headline tariff increase. ? There is overcapacity in the sector now.