Airtel kicked off the hike in January when it reduced free talk time for pre-paid customers by up to 25% and doubled call rates to Rs 2 per minute. Then, Idea hiked its rates from 1.2 paisa to 2 paisa per second, a 67% jump. Vodafone followed suit. Operators say eventually all circles and subscribers will be covered. But will this improve operators’ bottomlines? “It will lead to a lot of savings for them. The cumulative impact could be 1.5-2 paise on the average realisation per minute (ARPM),” says Rikesh Parikh, vice-president, equities, Motilal Oswal Securities. Airtel’s ARPM stood at 42.5 paise in Q3FY13 while for Idea it was 41.1 paise. These numbers stayed unchanged from the previous quarter because call rates had been plummeting though usage was going up.